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Mail::SpamAssassin::CoUser)Contributed Perl DocumenMail::SpamAssassin::Conf(3)

NAME
       Mail::SpamAssassin::Conf - SpamAssassin configuration file

SYNOPSIS
	 # a comment

	 rewrite_header Subject		 *****SPAM*****

	 full PARA_A_2_C_OF_1618	 /Paragraph .a.{0,10}2.{0,10}C. of S. 1618/i
	 describe PARA_A_2_C_OF_1618	 Claims compliance with senate bill 1618

	 header FROM_HAS_MIXED_NUMS	 From =~ /\d+[a-z]+\d+\S*@/i
	 describe FROM_HAS_MIXED_NUMS	 From: contains numbers mixed in with letters

	 score A_HREF_TO_REMOVE		 2.0

	 lang es describe FROM_FORGED_HOTMAIL Forzado From: simula ser de hotmail.com

	 lang pt_BR report O programa detetor de Spam ZOE [...]

DESCRIPTION
       SpamAssassin is configured using traditional UNIX-style configuration
       files, loaded from the "/usr/share/spamassassin" and
       "/etc/mail/spamassassin" directories.

       The following web page lists the most important configuration settings
       used to configure SpamAssassin; novices are encouraged to read it
       first:

	 http://wiki.apache.org/spamassassin/ImportantInitialConfigItems

FILE FORMAT
       The "#" character starts a comment, which continues until end of line.
       NOTE: if the "#" character is to be used as part of a rule or
       configuration option, it must be escaped with a backslash.  i.e.: "\#"

       Whitespace in the files is not significant, but please note that
       starting a line with whitespace is deprecated, as we reserve its use
       for multi-line rule definitions, at some point in the future.

       Currently, each rule or configuration setting must fit on one-line;
       multi-line settings are not supported yet.

       File and directory paths can use "~" to refer to the user's home
       directory, but no other shell-style path extensions such as globing or
       "~user/" are supported.

       Where appropriate below, default values are listed in parentheses.

USER PREFERENCES
       The following options can be used in both site-wide ("local.cf") and
       user-specific ("user_prefs") configuration files to customize how
       SpamAssassin handles incoming email messages.

   SCORING OPTIONS
       required_score n.nn (default: 5)
	   Set the score required before a mail is considered spam.  "n.nn"
	   can be an integer or a real number.	5.0 is the default setting,
	   and is quite aggressive; it would be suitable for a single-user
	   setup, but if you're an ISP installing SpamAssassin, you should
	   probably set the default to be more conservative, like 8.0 or 10.0.
	   It is not recommended to automatically delete or discard messages
	   marked as spam, as your users will complain, but if you choose to
	   do so, only delete messages with an exceptionally high score such
	   as 15.0 or higher. This option was previously known as
	   "required_hits" and that name is still accepted, but is deprecated.

       score SYMBOLIC_TEST_NAME n.nn [ n.nn n.nn n.nn ]
	   Assign scores (the number of points for a hit) to a given test.
	   Scores can be positive or negative real numbers or integers.
	   "SYMBOLIC_TEST_NAME" is the symbolic name used by SpamAssassin for
	   that test; for example, 'FROM_ENDS_IN_NUMS'.

	   If only one valid score is listed, then that score is always used
	   for a test.

	   If four valid scores are listed, then the score that is used
	   depends on how SpamAssassin is being used. The first score is used
	   when both Bayes and network tests are disabled (score set 0). The
	   second score is used when Bayes is disabled, but network tests are
	   enabled (score set 1). The third score is used when Bayes is
	   enabled and network tests are disabled (score set 2). The fourth
	   score is used when Bayes is enabled and network tests are enabled
	   (score set 3).

	   Setting a rule's score to 0 will disable that rule from running.

	   If any of the score values are surrounded by parenthesis '()', then
	   all of the scores in the line are considered to be relative to the
	   already set score.  ie: '(3)' means increase the score for this
	   rule by 3 points in all score sets.	'(3) (0) (3) (0)' means
	   increase the score for this rule by 3 in score sets 0 and 2 only.

	   If no score is given for a test by the end of the configuration, a
	   default score is assigned: a score of 1.0 is used for all tests,
	   except those whose names begin with 'T_' (this is used to indicate
	   a rule in testing) which receive 0.01.

	   Note that test names which begin with '__' are indirect rules used
	   to compose meta-match rules and can also act as prerequisites to
	   other rules.	 They are not scored or listed in the 'tests hit'
	   reports, but assigning a score of 0 to an indirect rule will
	   disable it from running.

   WHITELIST AND BLACKLIST OPTIONS
       whitelist_from user@example.com
	   Used to whitelist sender addresses which send mail that is often
	   tagged (incorrectly) as spam.

	   Use of this setting is not recommended, since it blindly trusts the
	   message, which is routinely and easily forged by spammers and phish
	   senders. The recommended solution is to instead use
	   "whitelist_auth" or other authenticated whitelisting methods, or
	   "whitelist_from_rcvd".

	   Whitelist and blacklist addresses are now file-glob-style patterns,
	   so "friend@somewhere.com", "*@isp.com", or "*.domain.net" will all
	   work.  Specifically, "*" and "?" are allowed, but all other
	   metacharacters are not.  Regular expressions are not used for
	   security reasons.

	   Multiple addresses per line, separated by spaces, is OK.  Multiple
	   "whitelist_from" lines is also OK.

	   The headers checked for whitelist addresses are as follows: if
	   "Resent-From" is set, use that; otherwise check all addresses taken
	   from the following set of headers:

		   Envelope-Sender
		   Resent-Sender
		   X-Envelope-From
		   From

	   In addition, the "envelope sender" data, taken from the SMTP
	   envelope data where this is available, is looked up.	 See
	   "envelope_sender_header".

	   e.g.

	     whitelist_from joe@example.com fred@example.com
	     whitelist_from *@example.com

       unwhitelist_from user@example.com
	   Used to override a default whitelist_from entry, so for example a
	   distribution whitelist_from can be overridden in a local.cf file,
	   or an individual user can override a whitelist_from entry in their
	   own "user_prefs" file.  The specified email address has to match
	   exactly the address previously used in a whitelist_from line.

	   e.g.

	     unwhitelist_from joe@example.com fred@example.com
	     unwhitelist_from *@example.com

       whitelist_from_rcvd addr@lists.sourceforge.net sourceforge.net
	   Works similarly to whitelist_from, except that in addition to
	   matching a sender address, a relay's rDNS name must match too for
	   the whitelisting rule to fire. The first parameter is an address to
	   whitelist, and the second is a string to match the relay's rDNS.

	   This string is matched against the reverse DNS lookup used during
	   the handover from the internet to your internal network's mail
	   exchangers.	It can either be the full hostname, or the domain
	   component of that hostname.	In other words, if the host that
	   connected to your MX had an IP address that mapped to
	   'sendinghost.spamassassin.org', you should specify
	   "sendinghost.spamassassin.org" or just "spamassassin.org" here.

	   Note that this requires that "internal_networks" be correct.	 For
	   simple cases, it will be, but for a complex network you may get
	   better results by setting that parameter.

	   It also requires that your mail exchangers be configured to perform
	   DNS reverse lookups on the connecting host's IP address, and to
	   record the result in the generated Received: header.

	   e.g.

	     whitelist_from_rcvd joe@example.com  example.com
	     whitelist_from_rcvd *@axkit.org	  sergeant.org

       def_whitelist_from_rcvd addr@lists.sourceforge.net sourceforge.net
	   Same as "whitelist_from_rcvd", but used for the default whitelist
	   entries in the SpamAssassin distribution.  The whitelist score is
	   lower, because these are often targets for spammer spoofing.

       whitelist_allows_relays user@example.com
	   Specify addresses which are in "whitelist_from_rcvd" that sometimes
	   send through a mail relay other than the listed ones. By default
	   mail with a From address that is in "whitelist_from_rcvd" that does
	   not match the relay will trigger a forgery rule. Including the
	   address in "whitelist_allows_relay" prevents that.

	   Whitelist and blacklist addresses are now file-glob-style patterns,
	   so "friend@somewhere.com", "*@isp.com", or "*.domain.net" will all
	   work.  Specifically, "*" and "?" are allowed, but all other
	   metacharacters are not.  Regular expressions are not used for
	   security reasons.

	   Multiple addresses per line, separated by spaces, is OK.  Multiple
	   "whitelist_allows_relays" lines is also OK.

	   The specified email address does not have to match exactly the
	   address previously used in a whitelist_from_rcvd line as it is
	   compared to the address in the header.

	   e.g.

	     whitelist_allows_relays joe@example.com fred@example.com
	     whitelist_allows_relays *@example.com

       unwhitelist_from_rcvd user@example.com
	   Used to override a default whitelist_from_rcvd entry, so for
	   example a distribution whitelist_from_rcvd can be overridden in a
	   local.cf file, or an individual user can override a
	   whitelist_from_rcvd entry in their own "user_prefs" file.

	   The specified email address has to match exactly the address
	   previously used in a whitelist_from_rcvd line.

	   e.g.

	     unwhitelist_from_rcvd joe@example.com fred@example.com
	     unwhitelist_from_rcvd *@axkit.org

       blacklist_from user@example.com
	   Used to specify addresses which send mail that is often tagged
	   (incorrectly) as non-spam, but which the user doesn't want.	Same
	   format as "whitelist_from".

       unblacklist_from user@example.com
	   Used to override a default blacklist_from entry, so for example a
	   distribution blacklist_from can be overridden in a local.cf file,
	   or an individual user can override a blacklist_from entry in their
	   own "user_prefs" file. The specified email address has to match
	   exactly the address previously used in a blacklist_from line.

	   e.g.

	     unblacklist_from joe@example.com fred@example.com
	     unblacklist_from *@spammer.com

       whitelist_to user@example.com
	   If the given address appears as a recipient in the message headers
	   (Resent-To, To, Cc, obvious envelope recipient, etc.) the mail will
	   be whitelisted.  Useful if you're deploying SpamAssassin system-
	   wide, and don't want some users to have their mail filtered.	 Same
	   format as "whitelist_from".

	   There are three levels of To-whitelisting, "whitelist_to",
	   "more_spam_to" and "all_spam_to".  Users in the first level may
	   still get some spammish mails blocked, but users in "all_spam_to"
	   should never get mail blocked.

	   The headers checked for whitelist addresses are as follows: if
	   "Resent-To" or "Resent-Cc" are set, use those; otherwise check all
	   addresses taken from the following set of headers:

		   To
		   Cc
		   Apparently-To
		   Delivered-To
		   Envelope-Recipients
		   Apparently-Resent-To
		   X-Envelope-To
		   Envelope-To
		   X-Delivered-To
		   X-Original-To
		   X-Rcpt-To
		   X-Real-To

       more_spam_to user@example.com
	   See above.

       all_spam_to user@example.com
	   See above.

       blacklist_to user@example.com
	   If the given address appears as a recipient in the message headers
	   (Resent-To, To, Cc, obvious envelope recipient, etc.) the mail will
	   be blacklisted.  Same format as "blacklist_from".

       whitelist_auth user@example.com
	   Used to specify addresses which send mail that is often tagged
	   (incorrectly) as spam.  This is different from "whitelist_from" and
	   "whitelist_from_rcvd" in that it first verifies that the message
	   was sent by an authorized sender for the address, before
	   whitelisting.

	   Authorization is performed using one of the installed sender-
	   authorization schemes: SPF (using
	   "Mail::SpamAssassin::Plugin::SPF"), or DKIM (using
	   "Mail::SpamAssassin::Plugin::DKIM").	 Note that those plugins must
	   be active, and working, for this to operate.

	   Using "whitelist_auth" is roughly equivalent to specifying
	   duplicate "whitelist_from_spf", "whitelist_from_dk", and
	   "whitelist_from_dkim" lines for each of the addresses specified.

	   e.g.

	     whitelist_auth joe@example.com fred@example.com
	     whitelist_auth *@example.com

       def_whitelist_auth user@example.com
	   Same as "whitelist_auth", but used for the default whitelist
	   entries in the SpamAssassin distribution.  The whitelist score is
	   lower, because these are often targets for spammer spoofing.

       unwhitelist_auth user@example.com
	   Used to override a "whitelist_auth" entry. The specified email
	   address has to match exactly the address previously used in a
	   "whitelist_auth" line.

	   e.g.

	     unwhitelist_auth joe@example.com fred@example.com
	     unwhitelist_auth *@example.com

   BASIC MESSAGE TAGGING OPTIONS
       rewrite_header { subject | from | to } STRING
	   By default, suspected spam messages will not have the "Subject",
	   "From" or "To" lines tagged to indicate spam. By setting this
	   option, the header will be tagged with "STRING" to indicate that a
	   message is spam. For the From or To headers, this will take the
	   form of an RFC 2822 comment following the address in parantheses.
	   For the Subject header, this will be prepended to the original
	   subject. Note that you should only use the _REQD_ and _SCORE_ tags
	   when rewriting the Subject header if "report_safe" is 0. Otherwise,
	   you may not be able to remove the SpamAssassin markup via the
	   normal methods.  More information about tags is explained below in
	   the TEMPLATE TAGS section.

	   Parentheses are not permitted in STRING if rewriting the From or To
	   headers.  (They will be converted to square brackets.)

	   If "rewrite_header subject" is used, but the message being
	   rewritten does not already contain a "Subject" header, one will be
	   created.

	   A null value for "STRING" will remove any existing rewrite for the
	   specified header.

       add_header { spam | ham | all } header_name string
	   Customized headers can be added to the specified type of messages
	   (spam, ham, or "all" to add to either).  All headers begin with
	   "X-Spam-" (so a "header_name" Foo will generate a header called
	   X-Spam-Foo).	 header_name is restricted to the character set
	   [A-Za-z0-9_-].

	   The order of "add_header" configuration options is preserved,
	   inserted headers will follow this order of declarations. When
	   combining "add_header" with "clear_headers" and "remove_header",
	   keep in mind that "add_header" appends a new header to the current
	   list, after first removing any existing header fields of the same
	   name. Note also that "add_header", "clear_headers" and
	   "remove_header" may appear in multiple .cf files, which are
	   interpreted in alphabetic order.

	   "string" can contain tags as explained below in the TEMPLATE TAGS
	   section.  You can also use "\n" and "\t" in the header to add
	   newlines and tabulators as desired.	A backslash has to be written
	   as \\, any other escaped chars will be silently removed.

	   All headers will be folded if fold_headers is set to 1. Note:
	   Manually adding newlines via "\n" disables any further automatic
	   wrapping (ie: long header lines are possible). The lines will still
	   be properly folded (marked as continuing) though.

	   You can customize existing headers with add_header (only the
	   specified subset of messages will be changed).

	   See also "clear_headers" and "remove_header" for removing headers.

	   Here are some examples (these are the defaults, note that Checker-
	   Version can not be changed or removed):

	     add_header spam Flag _YESNOCAPS_
	     add_header all Status _YESNO_, score=_SCORE_ required=_REQD_ tests=_TESTS_ autolearn=_AUTOLEARN_ version=_VERSION_
	     add_header all Level _STARS(*)_
	     add_header all Checker-Version SpamAssassin _VERSION_ (_SUBVERSION_) on _HOSTNAME_

       remove_header { spam | ham | all } header_name
	   Headers can be removed from the specified type of messages (spam,
	   ham, or "all" to remove from either).  All headers begin with
	   "X-Spam-" (so "header_name" will be appended to "X-Spam-").

	   See also "clear_headers" for removing all the headers at once.

	   Note that X-Spam-Checker-Version is not removable because the
	   version information is needed by mail administrators and developers
	   to debug problems.  Without at least one header, it might not even
	   be possible to determine that SpamAssassin is running.

       clear_headers
	   Clear the list of headers to be added to messages.  You may use
	   this before any add_header options to prevent the default headers
	   from being added to the message.

	   "add_header", "clear_headers" and "remove_header" may appear in
	   multiple .cf files, which are interpreted in alphabetic order, so
	   "clear_headers" in a later file will remove all added headers from
	   previously interpreted configuration files, which may or may not be
	   desired.

	   Note that X-Spam-Checker-Version is not removable because the
	   version information is needed by mail administrators and developers
	   to debug problems.  Without at least one header, it might not even
	   be possible to determine that SpamAssassin is running.

       report_safe ( 0 | 1 | 2 )     (default: 1)
	   if this option is set to 1, if an incoming message is tagged as
	   spam, instead of modifying the original message, SpamAssassin will
	   create a new report message and attach the original message as a
	   message/rfc822 MIME part (ensuring the original message is
	   completely preserved, not easily opened, and easier to recover).

	   If this option is set to 2, then original messages will be attached
	   with a content type of text/plain instead of message/rfc822.	 This
	   setting may be required for safety reasons on certain broken mail
	   clients that automatically load attachments without any action by
	   the user.  This setting may also make it somewhat more difficult to
	   extract or view the original message.

	   If this option is set to 0, incoming spam is only modified by
	   adding some "X-Spam-" headers and no changes will be made to the
	   body.  In addition, a header named X-Spam-Report will be added to
	   spam.  You can use the remove_header option to remove that header
	   after setting report_safe to 0.

	   See report_safe_copy_headers if you want to copy headers from the
	   original mail into tagged messages.

   LANGUAGE OPTIONS
       ok_locales xx [ yy zz ... ]	  (default: all)
	   This option is used to specify which locales are considered OK for
	   incoming mail.  Mail using the character sets that are allowed by
	   this option will not be marked as possibly being spam in a foreign
	   language.

	   If you receive lots of spam in foreign languages, and never get any
	   non-spam in these languages, this may help.	Note that all
	   ISO-8859-* character sets, and Windows code page character sets,
	   are always permitted by default.

	   Set this to "all" to allow all character sets.  This is the
	   default.

	   The rules "CHARSET_FARAWAY", "CHARSET_FARAWAY_BODY", and
	   "CHARSET_FARAWAY_HEADERS" are triggered based on how this is set.

	   Examples:

	     ok_locales all	    (allow all locales)
	     ok_locales en	    (only allow English)
	     ok_locales en ja zh    (allow English, Japanese, and Chinese)

	   Note: if there are multiple ok_locales lines, only the last one is
	   used.

	   Select the locales to allow from the list below:

	   en	- Western character sets in general
	   ja	- Japanese character sets
	   ko	- Korean character sets
	   ru	- Cyrillic character sets
	   th	- Thai character sets
	   zh	- Chinese (both simplified and traditional) character sets
       normalize_charset ( 0 | 1)	 (default: 0)
	   Whether to detect character sets and normalize message content to
	   Unicode.  Requires the Encode::Detect module, HTML::Parser version
	   3.46 or later, and Perl 5.8.5 or later.

   NETWORK TEST OPTIONS
       trusted_networks ip.add.re.ss[/mask] ...	  (default: none)
	   What networks or hosts are 'trusted' in your setup.	Trusted in
	   this case means that relay hosts on these networks are considered
	   to not be potentially operated by spammers, open relays, or open
	   proxies.  A trusted host could conceivably relay spam, but will not
	   originate it, and will not forge header data. DNS blacklist checks
	   will never query for hosts on these networks.

	   See "http://wiki.apache.org/spamassassin/TrustPath" for more
	   information.

	   MXes for your domain(s) and internal relays should also be
	   specified using the "internal_networks" setting. When there are
	   'trusted' hosts that are not MXes or internal relays for your
	   domain(s) they should only be specified in "trusted_networks".

	   If a "/mask" is specified, it's considered a CIDR-style 'netmask',
	   specified in bits.  If it is not specified, but less than 4 octets
	   are specified with a trailing dot, that's considered a mask to
	   allow all addresses in the remaining octets.	 If a mask is not
	   specified, and there is not trailing dot, then just the single IP
	   address specified is used, as if the mask was "/32".

	   If a network or host address is prefaced by a "!" the network or
	   host will be excluded (or included) in a first listed match
	   fashion.

	   Note: 127/8 and ::1 are always included in trusted_networks,
	   regardless of your config.

	   Examples:

	      trusted_networks 192.168/16	     # all in 192.168.*.*
	      trusted_networks 212.17.35.15	     # just that host
	      trusted_networks !10.0.1.5 10.0.1/24   # all in 10.0.1.* but not 10.0.1.5
	      trusted_networks DEAD:BEEF::/32	     # all in that ipv6 prefix

	   This operates additively, so a "trusted_networks" line after
	   another one will append new entries to the list of trusted
	   networks.  To clear out the existing entries, use
	   "clear_trusted_networks".

	   If "trusted_networks" is not set and "internal_networks" is, the
	   value of "internal_networks" will be used for this parameter.

	   If neither "trusted_networks" or "internal_networks" is set, a
	   basic inference algorithm is applied.  This works as follows:

	   ·   If the 'from' host has an IP address in a private (RFC 1918)
	       network range, then it's trusted

	   ·   If there are authentication tokens in the received header, and
	       the previous host was trusted, then this host is also trusted

	   ·   Otherwise this host, and all further hosts, are consider
	       untrusted.

       clear_trusted_networks
	   Empty the list of trusted networks.

       internal_networks ip.add.re.ss[/mask] ...   (default: none)
	   What networks or hosts are 'internal' in your setup.	  Internal
	   means that relay hosts on these networks are considered to be MXes
	   for your domain(s), or internal relays.  This uses the same format
	   as "trusted_networks", above.

	   This value is used when checking 'dial-up' or dynamic IP address
	   blocklists, in order to detect direct-to-MX spamming.

	   Trusted relays that accept mail directly from dial-up connections
	   (i.e. are also performing a role of mail submission agents - MSA)
	   should not be listed in "internal_networks". List them only in
	   "trusted_networks".

	   If "trusted_networks" is set and "internal_networks" is not, the
	   value of "trusted_networks" will be used for this parameter.

	   If neither "trusted_networks" nor "internal_networks" is set, no
	   addresses will be considered local; in other words, any relays past
	   the machine where SpamAssassin is running will be considered
	   external.

	   Every entry in "internal_networks" must appear in
	   "trusted_networks"; in other words, "internal_networks" is always a
	   subset of the trusted set.

	   Note: 127/8 and ::1 are always included in internal_networks,
	   regardless of your config.

       clear_internal_networks
	   Empty the list of internal networks.

       msa_networks ip.add.re.ss[/mask] ...   (default: none)
	   The networks or hosts which are acting as MSAs in your setup (but
	   not also as MX relays).  MSA means that the relay hosts on these
	   networks accept mail from your own users and authenticates them
	   appropriately.  These relays will never accept mail from hosts that
	   aren't authenticated in some way.  Examples of authentication
	   include, IP lists, SMTP AUTH, POP-before-SMTP, etc.

	   All relays found in the message headers after the MSA relay will
	   take on the same trusted and internal classifications as the MSA
	   relay itself, as defined by your trusted_networks and
	   internal_networks configuration.

	   For example, if the MSA relay is trusted and internal so will all
	   of the relays that precede it.

	   When using msa_networks to identify an MSA it is recommended that
	   you treat that MSA as both trusted and internal.  When an MSA is
	   not included in msa_networks you should treat the MSA as trusted
	   but not internal, however if the MSA is also acting as an MX or
	   intermediate relay you must always treat it as both trusted and
	   internal and ensure that the MSA includes visible auth tokens in
	   its Received header to identify submission clients.

	   Warning: Never include an MSA that also acts as an MX (or is also
	   an intermediate relay for an MX) or otherwise accepts mail from
	   non-authenticated users in msa_networks.  Doing so will result in
	   unknown external relays being trusted.

       clear_msa_networks
	   Empty the list of msa networks.

       originating_ip_headers header ...   (default: X-Yahoo-Post-IP
       X-Originating-IP X-Apparently-From X-SenderIP)
	   A list of header field names from which an originating IP address
	   can be obtained. For example, webmail servers may record a client
	   IP address in X-Originating-IP.

	   These IP addresses are virtually appended into the Received: chain,
	   so they are used in RBL checks where appropriate.

	   Currently the IP addresses are not added into X-Spam-Relays-*
	   header fields, but they may be in the future.

       clear_originating_ip_headers
	   Empty the list of 'originating IP address' header field names.

       always_trust_envelope_sender ( 0 | 1 )	(default: 0)
	   Trust the envelope sender even if the message has been passed
	   through one or more trusted relays.	See also
	   "envelope_sender_header".

       skip_rbl_checks ( 0 | 1 )   (default: 0)
	   Turning on the skip_rbl_checks setting will disable the DNSEval
	   plugin, which implements Real-time Block List (or: Blackhole List)
	   (RBL) lookups.

	   By default, SpamAssassin will run RBL checks. Individual blocklists
	   may be disabled selectively by setting a score of a corresponding
	   rule to 0.

	   See also a related configuration parameter skip_uribl_checks, which
	   controls the URIDNSBL plugin (documented in the URIDNSBL man page).

       dns_available { yes | test[: name1 name2...] | no }   (default: test)
	   By default, SpamAssassin will query some default hosts on the
	   internet to attempt to check if DNS is working or not. The problem
	   is that it can introduce some delay if your network connection is
	   down, and in some cases it can wrongly guess that DNS is
	   unavailable because the test connections failed.  SpamAssassin
	   includes a default set of 13 servers, among which 3 are picked
	   randomly.

	   You can however specify your own list by specifying

	     dns_available test: domain1.tld domain2.tld domain3.tld

	   Please note, the DNS test queries for NS records.

       dns_test_interval n   (default: 600 seconds)
	   If dns_available is set to 'test' (which is the default), the
	   dns_test_interval time in number of seconds will tell SpamAssassin
	   how often to retest for working DNS.

       dns_options rotate    (default: empty)
	   If set to 'rotate', this causes SpamAssassin to choose a DNS server
	   at random from all servers listed in "/etc/resolv.conf" every
	   'dns_test_interval' seconds, effectively spreading the load over
	   all currently available DNS servers when there are many spamd
	   workers.

   LEARNING OPTIONS
       use_learner ( 0 | 1 )	     (default: 1)
	   Whether to use any machine-learning classifiers with SpamAssassin,
	   such as the default 'BAYES_*' rules.	 Setting this to 0 will
	   disable use of any and all human-trained classifiers.

       use_bayes ( 0 | 1 )	(default: 1)
	   Whether to use the naive-Bayesian-style classifier built into
	   SpamAssassin.  This is a master on/off switch for all Bayes-related
	   operations.

       use_bayes_rules ( 0 | 1 )	  (default: 1)
	   Whether to use rules using the naive-Bayesian-style classifier
	   built into SpamAssassin.  This allows you to disable the rules
	   while leaving auto and manual learning enabled.

       bayes_auto_learn ( 0 | 1 )      (default: 1)
	   Whether SpamAssassin should automatically feed high-scoring mails
	   (or low-scoring mails, for non-spam) into its learning systems.
	   The only learning system supported currently is a naive-Bayesian-
	   style classifier.

	   See the documentation for the
	   "Mail::SpamAssassin::Plugin::AutoLearnThreshold" plugin module for
	   details on how Bayes auto-learning is implemented by default.

       bayes_ignore_header header_name
	   If you receive mail filtered by upstream mail systems, like a spam-
	   filtering ISP or mailing list, and that service adds new headers
	   (as most of them do), these headers may provide inappropriate cues
	   to the Bayesian classifier, allowing it to take a "short cut". To
	   avoid this, list the headers using this setting.  Example:

		   bayes_ignore_header X-Upstream-Spamfilter
		   bayes_ignore_header X-Upstream-SomethingElse

       bayes_ignore_from user@example.com
	   Bayesian classification and autolearning will not be performed on
	   mail from the listed addresses.  Program "sa-learn" will also
	   ignore the listed addresses if it is invoked using the
	   "--use-ignores" option.  One or more addresses can be listed, see
	   "whitelist_from".

	   Spam messages from certain senders may contain many words that
	   frequently occur in ham.  For example, one might read messages from
	   a preferred bookstore but also get unwanted spam messages from
	   other bookstores.  If the unwanted messages are learned as spam
	   then any messages discussing books, including the preferred
	   bookstore and antiquarian messages would be in danger of being
	   marked as spam.  The addresses of the annoying bookstores would be
	   listed.  (Assuming they were halfway legitimate and didn't send you
	   mail through myriad affiliates.)

	   Those who have pieces of spam in legitimate messages or otherwise
	   receive ham messages containing potentially spammy words might fear
	   that some spam messages might be in danger of being marked as ham.
	   The addresses of the spam mailing lists, correspondents, etc.
	   would be listed.

       bayes_ignore_to user@example.com
	   Bayesian classification and autolearning will not be performed on
	   mail to the listed addresses.  See "bayes_ignore_from" for details.

       bayes_min_ham_num	     (Default: 200)
       bayes_min_spam_num	(Default: 200)
	   To be accurate, the Bayes system does not activate until a certain
	   number of ham (non-spam) and spam have been learned.	 The default
	   is 200 of each ham and spam, but you can tune these up or down with
	   these two settings.

       bayes_learn_during_report	 (Default: 1)
	   The Bayes system will, by default, learn any reported messages
	   ("spamassassin -r") as spam.	 If you do not want this to happen,
	   set this option to 0.

       bayes_sql_override_username
	   Used by BayesStore::SQL storage implementation.

	   If this options is set the BayesStore::SQL module will override the
	   set username with the value given.  This could be useful for
	   implementing global or group bayes databases.

       bayes_use_hapaxes	(default: 1)
	   Should the Bayesian classifier use hapaxes (words/tokens that occur
	   only once) when classifying?	 This produces significantly better
	   hit-rates, but increases database size by about a factor of 8 to
	   10.

       bayes_journal_max_size	     (default: 102400)
	   SpamAssassin will opportunistically sync the journal and the
	   database.  It will do so once a day, but will sync more often if
	   the journal file size goes above this setting, in bytes.  If set to
	   0, opportunistic syncing will not occur.

       bayes_expiry_max_db_size	     (default: 150000)
	   What should be the maximum size of the Bayes tokens database?  When
	   expiry occurs, the Bayes system will keep either 75% of the maximum
	   value, or 100,000 tokens, whichever has a larger value.  150,000
	   tokens is roughly equivalent to a 8Mb database file.

       bayes_auto_expire	     (default: 1)
	   If enabled, the Bayes system will try to automatically expire old
	   tokens from the database.  Auto-expiry occurs when the number of
	   tokens in the database surpasses the bayes_expiry_max_db_size
	   value.

       bayes_learn_to_journal	(default: 0)
	   If this option is set, whenever SpamAssassin does Bayes learning,
	   it will put the information into the journal instead of directly
	   into the database.  This lowers contention for locking the database
	   to execute an update, but will also cause more access to the
	   journal and cause a delay before the updates are actually committed
	   to the Bayes database.

   MISCELLANEOUS OPTIONS
       time_limit n   (default: 300)
	   Specifies a limit on elapsed time in seconds that SpamAssassin is
	   allowed to spend before providing a result. The value may be
	   fractional and must not be negative, zero is interpreted as
	   unlimited. The default is 300 seconds for consistency with the
	   spamd default setting of --timeout-child .

	   This is a best-effort advisory setting, processing will not be
	   abruptly aborted at an arbitrary point in processing when the time
	   limit is exceeded, but only on reaching one of locations in the
	   program flow equipped with a time test. Currently equipped with the
	   test are the main checking loop, asynchronous DNS lookups, plugins
	   which are calling external programs.	 Rule evaluation is guarded by
	   starting a timer (alarm) on each set of compiled rules.

	   When a message is passed to Mail::SpamAssassin::parse, a deadline
	   time is established as a sum of current time and the "time_limit"
	   setting.

	   This deadline may also be specified by a caller through an option
	   'master_deadline' in $suppl_attrib on a call to parse(), possibly
	   providing a more accurate deadline taking into account past and
	   expected future processing of a message in a mail filtering setup.
	   If both the config option as well as a 'master_deadline' option in
	   a call are provided, the shorter time limit of the two is used
	   (since version 3.3.2).  Note that spamd (and possibly third-party
	   callers of SpamAssassin) will supply the 'master_deadline' option
	   in a call based on its --timeout-child option (or equivalent),
	   unlike the command line "spamassassin", which has no such command
	   line option.

	   When a time limit is exceeded, most of the remaining tests will be
	   skipped, as well as auto-learning. Whatever tests fired so far will
	   determine the final score. The behaviour is similar to short-
	   circuiting with attribute 'on', as implemented by a Shortcircuit
	   plugin. A synthetic hit on a rule named TIME_LIMIT_EXCEEDED with a
	   near-zero default score is generated, so that the report will
	   reflect the event. A score for TIME_LIMIT_EXCEEDED may be provided
	   explicitly in a configuration file, for example to achieve
	   whitelisting or blacklisting effect for messages with long
	   processing times.

	   The "time_limit" option is a useful protection against excessive
	   processing time on certain degenerate or unusually long or complex
	   mail messages, as well as against some DoS attacks. It is also
	   needed in time-critical pre-queue filtering setups (e.g. milter,
	   proxy, integration with MTA), where message processing must finish
	   before a SMTP client times out.  RFC 5321 prescribes in section
	   4.5.3.2.6 the 'DATA Termination' time limit of 10 minutes, although
	   it is not unusual to see some SMTP clients abort sooner on waiting
	   for a response. A sensible "time_limit" for a pre-queue filtering
	   setup is maybe 50 seconds, assuming that clients are willing to
	   wait at least a minute.

       lock_method type
	   Select the file-locking method used to protect database files on-
	   disk. By default, SpamAssassin uses an NFS-safe locking method on
	   UNIX; however, if you are sure that the database files you'll be
	   using for Bayes and AWL storage will never be accessed over NFS, a
	   non-NFS-safe locking system can be selected.

	   This will be quite a bit faster, but may risk file corruption if
	   the files are ever accessed by multiple clients at once, and one or
	   more of them is accessing them through an NFS filesystem.

	   Note that different platforms require different locking systems.

	   The supported locking systems for "type" are as follows:

	   nfssafe - an NFS-safe locking system
	   flock - simple UNIX "flock()" locking
	   win32 - Win32 locking using "sysopen (..., O_CREAT|O_EXCL)".

	   nfssafe and flock are only available on UNIX, and win32 is only
	   available on Windows.  By default, SpamAssassin will choose either
	   nfssafe or win32 depending on the platform in use.

       fold_headers ( 0 | 1 )	     (default: 1)
	   By default, headers added by SpamAssassin will be whitespace
	   folded.  In other words, they will be broken up into multiple lines
	   instead of one very long one and each continuation line will have a
	   tabulator prepended to mark it as a continuation of the preceding
	   one.

	   The automatic wrapping can be disabled here.	 Note that this can
	   generate very long lines.  RFC 2822 required that header lines do
	   not exceed 998 characters (not counting the final CRLF).

       report_safe_copy_headers header_name ...
	   If using "report_safe", a few of the headers from the original
	   message are copied into the wrapper header (From, To, Cc, Subject,
	   Date, etc.)	If you want to have other headers copied as well, you
	   can add them using this option.  You can specify multiple headers
	   on the same line, separated by spaces, or you can just use multiple
	   lines.

       envelope_sender_header Name-Of-Header
	   SpamAssassin will attempt to discover the address used in the 'MAIL
	   FROM:' phase of the SMTP transaction that delivered this message,
	   if this data has been made available by the SMTP server.  This is
	   used in the "EnvelopeFrom" pseudo-header, and for various rules
	   such as SPF checking.

	   By default, various MTAs will use different headers, such as the
	   following:

	       X-Envelope-From
	       Envelope-Sender
	       X-Sender
	       Return-Path

	   SpamAssassin will attempt to use these, if some heuristics (such as
	   the header placement in the message, or the absence of fetchmail
	   signatures) appear to indicate that they are safe to use.  However,
	   it may choose the wrong headers in some mailserver configurations.
	   (More discussion of this can be found in bug 2142 and bug 4747 in
	   the SpamAssassin BugZilla.)

	   To avoid this heuristic failure, the "envelope_sender_header"
	   setting may be helpful.  Name the header that your MTA or MDA adds
	   to messages containing the address used at the MAIL FROM step of
	   the SMTP transaction.

	   If the header in question contains "<" or ">" characters at the
	   start and end of the email address in the right-hand side, as in
	   the SMTP transaction, these will be stripped.

	   If the header is not found in a message, or if it's value does not
	   contain an "@" sign, SpamAssassin will issue a warning in the logs
	   and fall back to its default heuristics.

	   (Note for MTA developers: we would prefer if the use of a single
	   header be avoided in future, since that precludes 'downstream' spam
	   scanning.
	   "http://wiki.apache.org/spamassassin/EnvelopeSenderInReceived"
	   details a better proposal, storing the envelope sender at each hop
	   in the "Received" header.)

	   example:

	       envelope_sender_header X-SA-Exim-Mail-From

       describe SYMBOLIC_TEST_NAME description ...
	   Used to describe a test.  This text is shown to users in the
	   detailed report.

	   Note that test names which begin with '__' are reserved for meta-
	   match sub-rules, and are not scored or listed in the 'tests hit'
	   reports.

	   Also note that by convention, rule descriptions should be limited
	   in length to no more than 50 characters.

       report_charset CHARSET	     (default: unset)
	   Set the MIME Content-Type charset used for the text/plain report
	   which is attached to spam mail messages.

       report ...some text for a report...
	   Set the report template which is attached to spam mail messages.
	   See the "10_default_prefs.cf" configuration file in
	   "/usr/share/spamassassin" for an example.

	   If you change this, try to keep it under 78 columns. Each "report"
	   line appends to the existing template, so use
	   "clear_report_template" to restart.

	   Tags can be included as explained above.

       clear_report_template
	   Clear the report template.

       report_contact ...text of contact address...
	   Set what _CONTACTADDRESS_ is replaced with in the above report
	   text.  By default, this is 'the administrator of that system',
	   since the hostname of the system the scanner is running on is also
	   included.

       report_hostname ...hostname to use...
	   Set what _HOSTNAME_ is replaced with in the above report text.  By
	   default, this is determined dynamically as whatever the host
	   running SpamAssassin calls itself.

       unsafe_report ...some text for a report...
	   Set the report template which is attached to spam mail messages
	   which contain a non-text/plain part.	 See the "10_default_prefs.cf"
	   configuration file in "/usr/share/spamassassin" for an example.

	   Each "unsafe-report" line appends to the existing template, so use
	   "clear_unsafe_report_template" to restart.

	   Tags can be used in this template (see above for details).

       clear_unsafe_report_template
	   Clear the unsafe_report template.

RULE DEFINITIONS AND PRIVILEGED SETTINGS
       These settings differ from the ones above, in that they are considered
       'privileged'.  Only users running "spamassassin" from their
       procmailrc's or forward files, or sysadmins editing a file in
       "/etc/mail/spamassassin", can use them.	 "spamd" users cannot use them
       in their "user_prefs" files, for security and efficiency reasons,
       unless "allow_user_rules" is enabled (and then, they may only add rules
       from below).

       allow_user_rules ( 0 | 1 )	  (default: 0)
	   This setting allows users to create rules (and only rules) in their
	   "user_prefs" files for use with "spamd". It defaults to off,
	   because this could be a severe security hole. It may be possible
	   for users to gain root level access if "spamd" is run as root. It
	   is NOT a good idea, unless you have some other way of ensuring that
	   users' tests are safe. Don't use this unless you are certain you
	   know what you are doing. Furthermore, this option causes
	   spamassassin to recompile all the tests each time it processes a
	   message for a user with a rule in his/her "user_prefs" file, which
	   could have a significant effect on server load. It is not
	   recommended.

	   Note that it is not currently possible to use "allow_user_rules" to
	   modify an existing system rule from a "user_prefs" file with
	   "spamd".

       redirector_pattern  /pattern/modifiers
	   A regex pattern that matches both the redirector site portion, and
	   the target site portion of a URI.

	   Note: The target URI portion must be surrounded in parentheses and
		 no other part of the pattern may create a backreference.

	   Example:
	   http://chkpt.zdnet.com/chkpt/whatever/spammer.domain/yo/dude

	     redirector_pattern	   /^https?:\/\/(?:opt\.)?chkpt\.zdnet\.com\/chkpt\/\w+\/(.*)$/i

       header SYMBOLIC_TEST_NAME header op /pattern/modifiers [if-unset:
       STRING]
	   Define a test.  "SYMBOLIC_TEST_NAME" is a symbolic test name, such
	   as 'FROM_ENDS_IN_NUMS'.  "header" is the name of a mail header
	   field, such as 'Subject', 'To', 'From', etc.	 Header field names
	   are matched case-insensitively (conforming to RFC 5322 section
	   1.2.2), except for all-capitals metaheader fields such as ALL,
	   MESSAGEID, ALL-TRUSTED.

	   Appending a modifier ":raw" to a header field name will inhibit
	   decoding of quoted-printable or base-64 encoded strings, and will
	   preserve all whitespace inside the header string.  The ":raw" may
	   also be applied to pseudo-headers e.g. "ALL:raw" will return a
	   pristine (unmodified) header section.

	   Appending a modifier ":addr" to a header field name will cause
	   everything except the first email address to be removed from the
	   header field.  It is mainly applicable to header fields 'From',
	   'Sender', 'To', 'Cc' along with their 'Resent-*' counterparts, and
	   the 'Return-Path'.

	   Appending a modifier ":name" to a header field name will cause
	   everything except the first display name to be removed from the
	   header field.  It is mainly applicable to header fields 'From' and
	   'Resent-From'.

	   It is syntactically permitted to append more than one modifier to a
	   header field name, although currently most combinations achieve no
	   additional effect, for example "From:addr:raw" or "From:raw:addr"
	   is currently the same as "From:addr" .

	   example@foo
	   example@foo (Foo Blah)
	   example@foo, example@bar
	   display: example@foo (Foo Blah), example@bar ;
	   Foo Blah <example@foo>
	   "Foo Blah" <example@foo>
	   "'Foo Blah'" <example@foo>

	   Appending ":name" to the header name will cause everything except
	   the first real name to be removed from the header.  For example,
	   all of the following will result in "Foo Blah"

	   example@foo (Foo Blah)
	   example@foo (Foo Blah), example@bar
	   display: example@foo (Foo Blah), example@bar ;
	   Foo Blah <example@foo>
	   "Foo Blah" <example@foo>
	   "'Foo Blah'" <example@foo>

	   There are several special pseudo-headers that can be specified:

	   "ALL" can be used to mean the text of all the message's headers.
	   Note that all whitespace inside the headers, at line folds, is
	   currently compressed into a single space (' ') character. To obtain
	   a pristine (unmodified) header section, use "ALL:raw" - the :raw
	   modifier is documented above.
	   "ToCc" can be used to mean the contents of both the 'To' and 'Cc'
	   headers.
	   "EnvelopeFrom" is the address used in the 'MAIL FROM:' phase of the
	   SMTP transaction that delivered this message, if this data has been
	   made available by the SMTP server.  See "envelope_sender_header"
	   for more information on how to set this.
	   "MESSAGEID" is a symbol meaning all Message-Id's found in the
	   message; some mailing list software moves the real 'Message-Id' to
	   'Resent-Message-Id' or to 'X-Message-Id', then uses its own one in
	   the 'Message-Id' header. The value returned for this symbol is the
	   text from all 3 headers, separated by newlines.
	   "X-Spam-Relays-Untrusted", "X-Spam-Relays-Trusted",
	   "X-Spam-Relays-Internal" and "X-Spam-Relays-External" represent a
	   portable, pre-parsed representation of the message's network path,
	   as recorded in the Received headers, divided into 'trusted' vs
	   'untrusted' and 'internal' vs 'external' sets.  See
	   "http://wiki.apache.org/spamassassin/TrustedRelays" for more
	   details.

	   "op" is either "=~" (contains regular expression) or "!~" (does not
	   contain regular expression), and "pattern" is a valid Perl regular
	   expression, with "modifiers" as regexp modifiers in the usual
	   style.   Note that multi-line rules are not supported, even if you
	   use "x" as a modifier.  Also note that the "#" character must be
	   escaped ("\#") or else it will be considered to be the start of a
	   comment and not part of the regexp.

	   If the "[if-unset: STRING]" tag is present, then "STRING" will be
	   used if the header is not found in the mail message.

	   Test names must not start with a number, and must contain only
	   alphanumerics and underscores.  It is suggested that lower-case
	   characters not be used, and names have a length of no more than 22
	   characters, as an informal convention.  Dashes are not allowed.

	   Note that test names which begin with '__' are reserved for meta-
	   match sub-rules, and are not scored or listed in the 'tests hit'
	   reports.  Test names which begin with 'T_' are reserved for tests
	   which are undergoing QA, and these are given a very low score.

	   If you add or modify a test, please be sure to run a sanity check
	   afterwards by running "spamassassin --lint".	 This will avoid
	   confusing error messages, or other tests being skipped as a side-
	   effect.

       header SYMBOLIC_TEST_NAME exists:name_of_header
	   Define a header existence test.  "name_of_header" is the name of a
	   header field to test for existence.	This is just a very simple
	   version of the above header tests.

       header SYMBOLIC_TEST_NAME eval:name_of_eval_method([arguments])
	   Define a header eval test.  "name_of_eval_method" is the name of a
	   method on the "Mail::SpamAssassin::EvalTests" object.  "arguments"
	   are optional arguments to the function call.

       header SYMBOLIC_TEST_NAME eval:check_rbl('set', 'zone' [, 'sub-test'])
	   Check a DNSBL (a DNS blacklist or whitelist).  This will retrieve
	   Received: headers from the message, extract the IP addresses,
	   select which ones are 'untrusted' based on the "trusted_networks"
	   logic, and query that DNSBL zone.  There's a few things to note:

	   duplicated or private IPs
	       Duplicated IPs are only queried once and reserved IPs are not
	       queried.	 Private IPs are those listed in
	       <http://www.iana.org/assignments/ipv4-address-space>,
	       <http://duxcw.com/faq/network/privip.htm>,
	       <http://duxcw.com/faq/network/autoip.htm>, or
	       <ftp://ftp.rfc-editor.org/in-notes/rfc3330.txt> as private.

	   the 'set' argument
	       This is used as a 'zone ID'.  If you want to look up a
	       multiple-meaning zone like NJABL or SORBS, you can then query
	       the results from that zone using it; but all check_rbl_sub()
	       calls must use that zone ID.

	       Also, if more than one IP address gets a DNSBL hit for a
	       particular rule, it does not affect the score because rules
	       only trigger once per message.

	   the 'zone' argument
	       This is the root zone of the DNSBL, ending in a period.

	   the 'sub-test' argument
	       This optional argument behaves the same as the sub-test
	       argument in "check_rbl_sub()" below.

	   selecting all IPs except for the originating one
	       This is accomplished by placing '-notfirsthop' at the end of
	       the set name.  This is useful for querying against DNS lists
	       which list dialup IP addresses; the first hop may be a dialup,
	       but as long as there is at least one more hop, via their
	       outgoing SMTP server, that's legitimate, and so should not gain
	       points.	If there is only one hop, that will be queried anyway,
	       as it should be relaying via its outgoing SMTP server instead
	       of sending directly to your MX (mail exchange).

	   selecting IPs by whether they are trusted
	       When checking a 'nice' DNSBL (a DNS whitelist), you cannot
	       trust the IP addresses in Received headers that were not added
	       by trusted relays.  To test the first IP address that can be
	       trusted, place '-firsttrusted' at the end of the set name.
	       That should test the IP address of the relay that connected to
	       the most remote trusted relay.

	       Note that this requires that SpamAssassin know which relays are
	       trusted.	 For simple cases, SpamAssassin can make a good
	       estimate.  For complex cases, you may get better results by
	       setting "trusted_networks" manually.

	       In addition, you can test all untrusted IP addresses by placing
	       '-untrusted' at the end of the set name.	  Important note --
	       this does NOT include the IP address from the most recent
	       'untrusted line', as used in '-firsttrusted' above.  That's
	       because we're talking about the trustworthiness of the IP
	       address data, not the source header line, here; and in the case
	       of the most recent header (the 'firsttrusted'), that data can
	       be trusted.  See the Wiki page at
	       "http://wiki.apache.org/spamassassin/TrustedRelays" for more
	       information on this.

	   Selecting just the last external IP
	       By using '-lastexternal' at the end of the set name, you can
	       select only the external host that connected to your internal
	       network, or at least the last external host with a public IP.

       header SYMBOLIC_TEST_NAME eval:check_rbl_txt('set', 'zone')
	   Same as check_rbl(), except querying using IN TXT instead of IN A
	   records.  If the zone supports it, it will result in a line of text
	   describing why the IP is listed, typically a hyperlink to a
	   database entry.

       header SYMBOLIC_TEST_NAME eval:check_rbl_sub('set', 'sub-test')
	   Create a sub-test for 'set'.	 If you want to look up a multi-
	   meaning zone like relays.osirusoft.com, you can then query the
	   results from that zone using the zone ID from the original query.
	   The sub-test may either be an IPv4 dotted address for RBLs that
	   return multiple A records or a non-negative decimal number to
	   specify a bitmask for RBLs that return a single A record containing
	   a bitmask of results, a SenderBase test beginning with "sb:", or
	   (if none of the preceding options seem to fit) a regular
	   expression.

	   Note: the set name must be exactly the same for as the main query
	   rule, including selections like '-notfirsthop' appearing at the end
	   of the set name.

       body SYMBOLIC_TEST_NAME /pattern/modifiers
	   Define a body pattern test.	"pattern" is a Perl regular
	   expression.	Note: as per the header tests, "#" must be escaped
	   ("\#") or else it is considered the beginning of a comment.

	   The 'body' in this case is the textual parts of the message body;
	   any non-text MIME parts are stripped, and the message decoded from
	   Quoted-Printable or Base-64-encoded format if necessary.  The
	   message Subject header is considered part of the body and becomes
	   the first paragraph when running the rules.	All HTML tags and line
	   breaks will be removed before matching.

       body SYMBOLIC_TEST_NAME eval:name_of_eval_method([args])
	   Define a body eval test.  See above.

       uri SYMBOLIC_TEST_NAME /pattern/modifiers
	   Define a uri pattern test.  "pattern" is a Perl regular expression.
	   Note: as per the header tests, "#" must be escaped ("\#") or else
	   it is considered the beginning of a comment.

	   The 'uri' in this case is a list of all the URIs in the body of the
	   email, and the test will be run on each and every one of those
	   URIs, adjusting the score if a match is found. Use this test
	   instead of one of the body tests when you need to match a URI, as
	   it is more accurately bound to the start/end points of the URI, and
	   will also be faster.

       rawbody SYMBOLIC_TEST_NAME /pattern/modifiers
	   Define a raw-body pattern test.  "pattern" is a Perl regular
	   expression.	Note: as per the header tests, "#" must be escaped
	   ("\#") or else it is considered the beginning of a comment.

	   The 'raw body' of a message is the raw data inside all textual
	   parts. The text will be decoded from base64 or quoted-printable
	   encoding, but HTML tags and line breaks will still be present.
	   Multiline expressions will need to be used to match strings that
	   are broken by line breaks.

       rawbody SYMBOLIC_TEST_NAME eval:name_of_eval_method([args])
	   Define a raw-body eval test.	 See above.

       full SYMBOLIC_TEST_NAME /pattern/modifiers
	   Define a full message pattern test.	"pattern" is a Perl regular
	   expression.	Note: as per the header tests, "#" must be escaped
	   ("\#") or else it is considered the beginning of a comment.

	   The full message is the pristine message headers plus the pristine
	   message body, including all MIME data such as images, other
	   attachments, MIME boundaries, etc.

       full SYMBOLIC_TEST_NAME eval:name_of_eval_method([args])
	   Define a full message eval test.  See above.

       meta SYMBOLIC_TEST_NAME boolean expression
	   Define a boolean expression test in terms of other tests that have
	   been hit or not hit.	 For example:

	   meta META1	     TEST1 && !(TEST2 || TEST3)

	   Note that English language operators ("and", "or") will be treated
	   as rule names, and that there is no "XOR" operator.

       meta SYMBOLIC_TEST_NAME boolean arithmetic expression
	   Can also define an arithmetic expression in terms of other tests,
	   with an unhit test having the value "0" and a hit test having a
	   nonzero value.  The value of a hit meta test is that of its
	   arithmetic expression.  The value of a hit eval test is that
	   returned by its method.  The value of a hit header, body, rawbody,
	   uri, or full test which has the "multiple" tflag is the number of
	   times the test hit.	The value of any other type of hit test is
	   "1".

	   For example:

	   meta META2	     (3 * TEST1 - 2 * TEST2) > 0

	   Note that Perl builtins and functions, like "abs()", can't be used,
	   and will be treated as rule names.

	   If you want to define a meta-rule, but do not want its individual
	   sub-rules to count towards the final score unless the entire meta-
	   rule matches, give the sub-rules names that start with '__' (two
	   underscores).  SpamAssassin will ignore these for scoring.

       reuse SYMBOLIC_TEST_NAME [ OLD_SYMBOLIC_TEST_NAME_1 ... ]
	   Defines the name of a test that should be "reused" during the
	   scoring process. If a message has an X-Spam-Status header that
	   shows a hit for this rule or any of the old rule names given, a hit
	   will be added for this rule when mass-check --reuse is used.
	   Examples:

	   "reuse SPF_PASS"

	   "reuse MY_NET_RULE_V2 MY_NET_RULE_V1"

	   The actual logic for reuse tests is done by
	   Mail::SpamAssassin::Plugin::Reuse.

       tflags SYMBOLIC_TEST_NAME [
       {net|nice|learn|userconf|noautolearn|multiple} ]
	   Used to set flags on a test.	 These flags are used in the score-
	   determination back end system for details of the test's behaviour.
	   Please see "bayes_auto_learn" for more information about tflag
	   interaction with those systems. The following flags can be set:

	   net The test is a network test, and will not be run in the mass
	       checking system or if -L is used, therefore its score should
	       not be modified.

	   nice
	       The test is intended to compensate for common false positives,
	       and should be assigned a negative score.

	   userconf
	       The test requires user configuration before it can be used
	       (like language- specific tests).

	   learn
	       The test requires training before it can be used.

	   noautolearn
	       The test will explicitly be ignored when calculating the score
	       for learning systems.

	   multiple
	       The test will be evaluated multiple times, for use with meta
	       rules.  Only affects header, body, rawbody, uri, and full
	       tests.

       priority SYMBOLIC_TEST_NAME n
	   Assign a specific priority to a test.  All tests, except for DNS
	   and Meta tests, are run in increasing priority value order
	   (negative priority values are run before positive priority values).
	   The default test priority is 0 (zero).

	   The values <-99999999999999> and <-99999999999998> have a special
	   meaning internally, and should not be used.

ADMINISTRATOR SETTINGS
       These settings differ from the ones above, in that they are considered
       'more privileged' -- even more than the ones in the PRIVILEGED SETTINGS
       section.	 No matter what "allow_user_rules" is set to, these can never
       be set from a user's "user_prefs" file when spamc/spamd is being used.
       However, all settings can be used by local programs run directly by the
       user.

       version_tag string
	   This tag is appended to the SA version in the X-Spam-Status header.
	   You should include it when modify your ruleset, especially if you
	   plan to distribute it.  A good choice for string is your last name
	   or your initials followed by a number which you increase with each
	   change.

	   The version_tag will be lowercased, and any non-alphanumeric or
	   period character will be replaced by an underscore.

	   e.g.

	     version_tag myrules1    # version=2.41-myrules1

       test SYMBOLIC_TEST_NAME (ok|fail) Some string to test against
	   Define a regression testing string. You can have more than one
	   regression test string per symbolic test name. Simply specify a
	   string that you wish the test to match.

	   These tests are only run as part of the test suite - they should
	   not affect the general running of SpamAssassin.

       rbl_timeout t [t_min] [zone]	  (default: 15 3)
	   All DNS queries are made at the beginning of a check and we try to
	   read the results at the end.	 This value specifies the maximum
	   period of time (in seconds) to wait for a DNS query.	 If most of
	   the DNS queries have succeeded for a particular message, then
	   SpamAssassin will not wait for the full period to avoid wasting
	   time on unresponsive server(s), but will shrink the timeout
	   according to a percentage of queries already completed.  As the
	   number of queries remaining approaches 0, the timeout value will
	   gradually approach a t_min value, which is an optional second
	   parameter and defaults to 0.2 * t.  If t is smaller than t_min, the
	   initial timeout is set to t_min.  Here is a chart of queries
	   remaining versus the timeout in seconds, for the default 15 second
	   / 3 second timeout setting:

	     queries left  100%	 90%  80%  70%	60%  50%  40%  30%  20%	 10%   0%
	     timeout	    15	 14.9 14.5 13.9 13.1 12.0 10.7	9.1  7.3  5.3  3

	   For example, if 20 queries are made at the beginning of a message
	   check and 16 queries have returned (leaving 20%), the remaining 4
	   queries should finish within 7.3 seconds since their query started
	   or they will be timed out.  Note that timed out queries are only
	   aborted when there is nothing else left for SpamAssassin to do -
	   long evaluation of other rules may grant queries additional time.

	   If a parameter 'zone' is specified (it must end with a letter,
	   which distinguishes it from other numeric parametrs), then the
	   setting only applies to DNS queries against the specified DNS
	   domain (host, domain or RBL (sub)zone).  Matching is case-
	   insensitive, the actual domain may be a subdomain of the specified
	   zone.

       util_rb_tld tld1 tld2 ...
	   This option allows the addition of new TLDs to the
	   RegistrarBoundaries code.  Updates to the list usually happen when
	   new versions of SpamAssassin are released, but sometimes it's
	   necessary to add in new TLDs faster than a release can occur.  TLDs
	   include things like com, net, org, etc.

       util_rb_2tld 2tld-1.tld 2tld-2.tld ...
	   This option allows the addition of new 2nd-level TLDs (2TLD) to the
	   RegistrarBoundaries code.  Updates to the list usually happen when
	   new versions of SpamAssassin are released, but sometimes it's
	   necessary to add in new 2TLDs faster than a release can occur.
	   2TLDs include things like co.uk, fed.us, etc.

       util_rb_3tld 3tld1.some.tld 3tld2.other.tld ...
	   This option allows the addition of new 3rd-level TLDs (3TLD) to the
	   RegistrarBoundaries code.  Updates to the list usually happen when
	   new versions of SpamAssassin are released, but sometimes it's
	   necessary to add in new 3TLDs faster than a release can occur.
	   3TLDs include things like demon.co.uk, plc.co.im, etc.

       bayes_path /path/filename     (default: ~/.spamassassin/bayes)
	   This is the directory and filename for Bayes databases.  Several
	   databases will be created, with this as the base directory and
	   filename, with "_toks", "_seen", etc. appended to the base.	The
	   default setting results in files called
	   "~/.spamassassin/bayes_seen", "~/.spamassassin/bayes_toks", etc.

	   By default, each user has their own in their "~/.spamassassin"
	   directory with mode 0700/0600.  For system-wide SpamAssassin use,
	   you may want to reduce disk space usage by sharing this across all
	   users.  However, Bayes appears to be more effective with individual
	   user databases.

       bayes_file_mode		(default: 0700)
	   The file mode bits used for the Bayesian filtering database files.

	   Make sure you specify this using the 'x' mode bits set, as it may
	   also be used to create directories.	However, if a file is created,
	   the resulting file will not have any execute bits set (the umask is
	   set to 111). The argument is a string of octal digits, it is
	   converted to a numeric value internally.

       bayes_store_module Name::Of::BayesStore::Module
	   If this option is set, the module given will be used as an
	   alternate to the default bayes storage mechanism.  It must conform
	   to the published storage specification (see
	   Mail::SpamAssassin::BayesStore). For example, set this to
	   Mail::SpamAssassin::BayesStore::SQL to use the generic SQL storage
	   module.

       bayes_sql_dsn DBI::databasetype:databasename:hostname:port
	   Used for BayesStore::SQL storage implementation.

	   This option give the connect string used to connect to the SQL
	   based Bayes storage.

       bayes_sql_username
	   Used by BayesStore::SQL storage implementation.

	   This option gives the username used by the above DSN.

       bayes_sql_password
	   Used by BayesStore::SQL storage implementation.

	   This option gives the password used by the above DSN.

       bayes_sql_username_authorized ( 0 | 1 )	(default: 0)
	   Whether to call the services_authorized_for_username plugin hook in
	   BayesSQL.  If the hook does not determine that the user is allowed
	   to use bayes or is invalid then then database will not be
	   initialized.

	   NOTE: By default the user is considered invalid until a plugin
	   returns a true value.  If you enable this, but do not have a proper
	   plugin loaded, all users will turn up as invalid.

	   The username passed into the plugin can be affected by the
	   bayes_sql_override_username config option.

       user_scores_dsn DBI:databasetype:databasename:hostname:port
	   If you load user scores from an SQL database, this will set the DSN
	   used to connect.  Example: "DBI:mysql:spamassassin:localhost"

	   If you load user scores from an LDAP directory, this will set the
	   DSN used to connect. You have to write the DSN as an LDAP URL, the
	   components being the host and port to connect to, the base DN for
	   the search, the scope of the search (base, one or sub), the single
	   attribute being the multivalued attribute used to hold the
	   configuration data (space separated pairs of key and value, just as
	   in a file) and finally the filter being the expression used to
	   filter out the wanted username. Note that the filter expression is
	   being used in a sprintf statement with the username as the only
	   parameter, thus is can hold a single __USERNAME__ expression. This
	   will be replaced with the username.

	   Example:
	   "ldap://localhost:389/dc=koehntopp,dc=de?saconfig?uid=__USERNAME__"

       user_scores_sql_username username
	   The authorized username to connect to the above DSN.

       user_scores_sql_password password
	   The password for the database username, for the above DSN.

       user_scores_sql_custom_query query
	   This option gives you the ability to create a custom SQL query to
	   retrieve user scores and preferences.  In order to work correctly
	   your query should return two values, the preference name and value,
	   in that order.  In addition, there are several "variables" that you
	   can use as part of your query, these variables will be substituted
	   for the current values right before the query is run.  The current
	   allowed variables are:

	   _TABLE_
	       The name of the table where user scores and preferences are
	       stored. Currently hardcoded to userpref, to change this value
	       you need to create a new custom query with the new table name.

	   _USERNAME_
	       The current user's username.

	   _MAILBOX_
	       The portion before the @ as derived from the current user's
	       username.

	   _DOMAIN_
	       The portion after the @ as derived from the current user's
	       username, this value may be null.

	   The query must be one continuous line in order to parse correctly.

	   Here are several example queries, please note that these are broken
	   up for easy reading, in your config it should be one continuous
	   line.

	   Current default query:
	       "SELECT preference, value FROM _TABLE_ WHERE username =
	       _USERNAME_ OR username = '@GLOBAL' ORDER BY username ASC"

	   Use global and then domain level defaults:
	       "SELECT preference, value FROM _TABLE_ WHERE username =
	       _USERNAME_ OR username = '@GLOBAL' OR username = '@~'||_DOMAIN_
	       ORDER BY username ASC"

	   Maybe global prefs should override user prefs:
	       "SELECT preference, value FROM _TABLE_ WHERE username =
	       _USERNAME_ OR username = '@GLOBAL' ORDER BY username DESC"

       user_scores_ldap_username
	   This is the Bind DN used to connect to the LDAP server.  It
	   defaults to the empty string (""), allowing anonymous binding to
	   work.

	   Example: "cn=master,dc=koehntopp,dc=de"

       user_scores_ldap_password
	   This is the password used to connect to the LDAP server.  It
	   defaults to the empty string ("").

       loadplugin PluginModuleName [/path/module.pm]
	   Load a SpamAssassin plugin module.  The "PluginModuleName" is the
	   perl module name, used to create the plugin object itself.

	   "/path/to/module.pm" is the file to load, containing the module's
	   perl code; if it's specified as a relative path, it's considered to
	   be relative to the current configuration file.  If it is omitted,
	   the module will be loaded using perl's search path (the @INC
	   array).

	   See "Mail::SpamAssassin::Plugin" for more details on writing
	   plugins.

       tryplugin PluginModuleName [/path/module.pm]
	   Same as "loadplugin", but silently ignored if the .pm file cannot
	   be found in the filesystem.

       ignore_always_matching_regexps	      (Default: 0)
	   Ignore any rule which contains a regexp which always matches.
	   Currently only catches regexps which contain '||', or which begin
	   or end with a '|'.  Also ignore rules with "some" combinatorial
	   explosions.

PREPROCESSING OPTIONS
       include filename
	   Include configuration lines from "filename".	  Relative paths are
	   considered relative to the current configuration file or user
	   preferences file.

       if (boolean perl expression)
	   Used to support conditional interpretation of the configuration
	   file. Lines between this and a corresponding "else" or "endif" line
	   will be ignored unless the expression evaluates as true (in the
	   perl sense; that is, defined and non-0 and non-empty string).

	   The conditional accepts a limited subset of perl for security --
	   just enough to perform basic arithmetic comparisons.	 The following
	   input is accepted:

	   numbers, whitespace, arithmetic operations and grouping
	       Namely these characters and ranges:

		 ( ) - + * / _ . , < = > ! ~ 0-9 whitespace

	   version
	       This will be replaced with the version number of the currently-
	       running SpamAssassin engine.  Note: The version used is in the
	       internal SpamAssassin version format which is "x.yyyzzz", where
	       x is major version, y is minor version, and z is maintenance
	       version.	 So 3.0.0 is 3.000000, and 3.4.80 is 3.004080.

	   plugin(Name::Of::Plugin)
	       This is a function call that returns 1 if the plugin named
	       "Name::Of::Plugin" is loaded, or "undef" otherwise.

	   can(Name::Of::Package::function_name)
	       This is a function call that returns 1 if the perl package
	       named "Name::Of::Package" includes a function called
	       "function_name", or "undef" otherwise.  Note that packages can
	       be SpamAssassin plugins or built-in classes, there's no
	       difference in this respect.

	   If the end of a configuration file is reached while still inside a
	   "if" scope, a warning will be issued, but parsing will restart on
	   the next file.

	   For example:

		   if (version > 3.000000)
		     header MY_FOO ...
		   endif

		   loadplugin MyPlugin plugintest.pm

		   if plugin (MyPlugin)
		     header MY_PLUGIN_FOO  eval:check_for_foo()
		     score  MY_PLUGIN_FOO  0.1
		   endif

       ifplugin PluginModuleName
	   An alias for "if plugin(PluginModuleName)".

       else
	   Used to support conditional interpretation of the configuration
	   file. Lines between this and a corresponding "endif" line, will be
	   ignored unless the conditional expression evaluates as false (in
	   the perl sense; that is, not defined and not 0 and non-empty
	   string).

       require_version n.nnnnnn
	   Indicates that the entire file, from this line on, requires a
	   certain version of SpamAssassin to run.  If a different (older or
	   newer) version of SpamAssassin tries to read the configuration from
	   this file, it will output a warning instead, and ignore it.

	   Note: The version used is in the internal SpamAssassin version
	   format which is "x.yyyzzz", where x is major version, y is minor
	   version, and z is maintenance version.  So 3.0.0 is 3.000000, and
	   3.4.80 is 3.004080.

TEMPLATE TAGS
       The following "tags" can be used as placeholders in certain options.
       They will be replaced by the corresponding value when they are used.

       Some tags can take an argument (in parentheses). The argument is
       optional, and the default is shown below.

	_YESNO_		  "Yes" for spam, "No" for nonspam (=ham)
	_YESNO(spam_str,ham_str)_  returns the first argument ("Yes" if missing)
			  for spam, and the second argument ("No" if missing) for ham
	_YESNOCAPS_	  "YES" for spam, "NO" for nonspam (=ham)
	_YESNOCAPS(spam_str,ham_str)_  same as _YESNO(...)_, but uppercased
	_SCORE(PAD)_	  message score, if PAD is included and is either spaces or
			  zeroes, then pad scores with that many spaces or zeroes
			  (default, none)  ie: _SCORE(0)_ makes 2.4 become 02.4,
			  _SCORE(00)_ is 002.4.	 12.3 would be 12.3 and 012.3
			  respectively.
	_REQD_		  message threshold
	_VERSION_	  version (eg. 3.0.0 or 3.1.0-r26142-foo1)
	_SUBVERSION_	  sub-version/code revision date (eg. 2004-01-10)
	_HOSTNAME_	  hostname of the machine the mail was processed on
	_REMOTEHOSTNAME_  hostname of the machine the mail was sent from, only
			  available with spamd
	_REMOTEHOSTADDR_  ip address of the machine the mail was sent from, only
			  available with spamd
	_BAYES_		  bayes score
	_TOKENSUMMARY_	  number of new, neutral, spammy, and hammy tokens found
	_BAYESTC_	  number of new tokens found
	_BAYESTCLEARNED_  number of seen tokens found
	_BAYESTCSPAMMY_	  number of spammy tokens found
	_BAYESTCHAMMY_	  number of hammy tokens found
	_HAMMYTOKENS(N)_  the N most significant hammy tokens (default, 5)
	_SPAMMYTOKENS(N)_ the N most significant spammy tokens (default, 5)
	_DATE_		  rfc-2822 date of scan
	_STARS(*)_	  one "*" (use any character) for each full score point
			  (note: limited to 50 'stars')
	_RELAYSTRUSTED_	  relays used and deemed to be trusted (see the
			  'X-Spam-Relays-Trusted' pseudo-header)
	_RELAYSUNTRUSTED_ relays used that can not be trusted (see the
			  'X-Spam-Relays-Untrusted' pseudo-header)
	_RELAYSINTERNAL_  relays used and deemed to be internal (see the
			  'X-Spam-Relays-Internal' pseudo-header)
	_RELAYSEXTERNAL_  relays used and deemed to be external (see the
			  'X-Spam-Relays-External' pseudo-header)
	_LASTEXTERNALIP_  IP address of client in the external-to-internal
			  SMTP handover
	_LASTEXTERNALRDNS_ reverse-DNS of client in the external-to-internal
			  SMTP handover
	_LASTEXTERNALHELO_ HELO string used by client in the external-to-internal
			  SMTP handover
	_AUTOLEARN_	  autolearn status ("ham", "no", "spam", "disabled",
			  "failed", "unavailable")
	_AUTOLEARNSCORE_  portion of message score used by autolearn
	_TESTS(,)_	  tests hit separated by "," (or other separator)
	_TESTSSCORES(,)_  as above, except with scores appended (eg. AWL=-3.0,...)
	_SUBTESTS(,)_	  subtests (start with "__") hit separated by ","
			  (or other separator)
	_DCCB_		  DCC's "Brand"
	_DCCR_		  DCC's results
	_PYZOR_		  Pyzor results
	_RBL_		  full results for positive RBL queries in DNS URI format
	_LANGUAGES_	  possible languages of mail
	_PREVIEW_	  content preview
	_REPORT_	  terse report of tests hit (for header reports)
	_SUMMARY_	  summary of tests hit for standard report (for body reports)
	_CONTACTADDRESS_  contents of the 'report_contact' setting
	_HEADER(NAME)_	  includes the value of a message header.  value is the same
			  as is found for header rules (see elsewhere in this doc)
	_TIMING_	  timing breakdown report
	_ADDEDHEADERHAM_  resulting header fields as requested by add_header for spam
	_ADDEDHEADERSPAM_ resulting header fields as requested by add_header for ham
	_ADDEDHEADER_	  same as ADDEDHEADERHAM for ham or ADDEDHEADERSPAM for spam

       If a tag reference uses the name of a tag which is not in this list or
       defined by a loaded plugin, the reference will be left intact and not
       replaced by any value.

       The "HAMMYTOKENS" and "SPAMMYTOKENS" tags have an optional second
       argument which specifies a format.  See the HAMMYTOKENS/SPAMMYTOKENS
       TAG FORMAT section, below, for details.

   HAMMYTOKENS/SPAMMYTOKENS TAG FORMAT
       The "HAMMYTOKENS" and "SPAMMYTOKENS" tags have an optional second
       argument which specifies a format: "_SPAMMYTOKENS(N,FMT)_",
       "_HAMMYTOKENS(N,FMT)_" The following formats are available:

       short
	   Only the tokens themselves are listed.  For example, preference
	   file entry:

	   "add_header all Spammy _SPAMMYTOKENS(2,short)_"

	   Results in message header:

	   "X-Spam-Spammy: remove.php, UD:jpg"

	   Indicating that the top two spammy tokens found are "remove.php"
	   and "UD:jpg".  (The token itself follows the last colon, the text
	   before the colon indicates something about the token.  "UD" means
	   the token looks like it might be part of a domain name.)

       compact
	   The token probability, an abbreviated declassification distance
	   (see example), and the token are listed.  For example, preference
	   file entry:

	   "add_header all Spammy _SPAMMYTOKENS(2,compact)_"

	   Results in message header:

	   "0.989-6--remove.php, 0.988-+--UD:jpg"

	   Indicating that the probabilities of the top two tokens are 0.989
	   and 0.988, respectively.  The first token has a declassification
	   distance of 6, meaning that if the token had appeared in at least 6
	   more ham messages it would not be considered spammy.	 The "+" for
	   the second token indicates a declassification distance greater than
	   9.

       long
	   Probability, declassification distance, number of times seen in a
	   ham message, number of times seen in a spam message, age and the
	   token are listed.

	   For example, preference file entry:

	   "add_header all Spammy _SPAMMYTOKENS(2,long)_"

	   Results in message header:

	   "X-Spam-Spammy: 0.989-6--0h-4s--4d--remove.php,
	   0.988-33--2h-25s--1d--UD:jpg"

	   In addition to the information provided by the compact option, the
	   long option shows that the first token appeared in zero ham
	   messages and four spam messages, and that it was last seen four
	   days ago.  The second token appeared in two ham messages, 25 spam
	   messages and was last seen one day ago.  (Unlike the "compact"
	   option, the long option shows declassification distances that are
	   greater than 9.)

LOCALI[SZ]ATION
       A line starting with the text "lang xx" will only be interpreted if the
       user is in that locale, allowing test descriptions and templates to be
       set for that language.

       The locales string should specify either both the language and country,
       e.g.  "lang pt_BR", or just the language, e.g. "lang de".

SEE ALSO
       "Mail::SpamAssassin" "spamassassin" "spamd"

perl v5.18.1			  2011-06-06	   Mail::SpamAssassin::Conf(3)
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