MAKEHOSTEDDOMAINS(8) Double Precision, Inc. MAKEHOSTEDDOMAINS(8)NAMEmakehosteddomains - Build a database of hosted domains
SYNOPSISmakehosteddomainsDESCRIPTIONmakehosteddomains rebuilds the contents of the
/usr/local/etc/courier/hosteddomains.dat database from the contents of
/usr/local/etc/courier/hosteddomains. This can be either a file or a
directory. If it´s a directory, the contents of all the files in this
directory are simply concatenated. The makehosteddomains script must be
run in order for any changes to /usr/local/etc/courier/hosteddomains to
take effect.
The function of /usr/local/etc/courier/hosteddomains is very similar to
the one of /usr/local/etc/courier/locals. Both configuration files
specify a list of domains that are considered to be local domains -
domains whose mailboxes are stored locally.
The difference is that domains listed in /usr/local/etc/courier/locals
are removed from addresses before their mailbox is looked up. For
example, if the domain "example.com" is listed in
/usr/local/etc/courier/locals, then the address <user@example.com> is
delivered to a local mailbox named "user". If this domain is listed,
instead, in /usr/local/etc/courier/hosteddomains, then the address
<user@example.com> is delivered to a local mailbox named
"user@example.com". Usually you would use /usr/local/etc/courier/locals
to specify domains that correspond to your local system accounts, that
are looked up in your system´s password database. The
/usr/local/etc/courier/hosteddomains file is usually used when you have
database-based virtual domains, that are maintained via an LDAP or a
MySQL server. The Courier mail server´s LDAP and MySQL authentication
modules will use the full E-mail address to query the LDAP or MySQL
server for the location of the local mailbox that correspond to the
E-mail address. The Courier mail server´s authuserdb authentication
module can also use full E-mail addresses.
Contents of hosteddomains
The file /usr/local/etc/courier/hosteddomains simply contains a list of
domains, one per line, for example:
domain.com
example.org
Each domain can optionally be followed by a single tab character, in
order to specify an alias for a domain, for example:
domain.com
mail.domain.com<TAB>domain.com
example.com<TAB>domain.com
First, we list the domain "domain.com" as a hosted domain. Then, we
also list the domain "mail.domain.com", which is an alias for
domain.com. The Courier mail server will take any address of the form
<address@mail.domain.com>, rewrite it as <address@domain.com>, and
attempt to deliver the mail to a local mailbox for that name. The third
entry does the same for "example.com"; mail addressed to
<address@example.com> is delivered to the local mailbox
<address@domain.com>.
alias@hosteddomain
This is a special local mail delivery rule for hosteddomain-listed
domains. This rule allows the Courier mail server accept mail to any
address@hosteddomain, where "hosteddomain" is a domain listed in the
hosteddomains file, but there is no corresponding account for
address@hosteddomain. To provide delivery instructions for any
non-existing address in a hosteddomain-listed domain:
1) Create the local address alias@hosteddomain. For example, if the
hosteddomains file contains "example.com", create the local account
alias@example.com. This should be a normal account, with its own home
directory, userid and groupid.
2) Create $HOME/.courier-default file in this account, containing the
delivery instructions. See the dot-courier(5)[1] manual page for
available delivery instructions.
NOTE that alias@example.com must be a real account, not a mail alias.
If you want to forward alias@example.com to another address, put
forwarding instructions in the .courier-default file. However,
alias@example.com can be a clone of another account (with the same home
directory, userid, and groupid).
“WILDCARD DNS”
Wildcard DNS is supported for hosteddomains by placing a single period
character before the domain name. For example, the hosted domain entry
“.domain.com” will cause the Courier mail server to accept mail for
“anything.domain.com”.
The Courier mail server will accept mail for
<address@any.thing.domain.com> and attempt to deliver it to the local
mailbox <address@any.thing.domain.com>, and if that fails then attempt
to deliver the mail to the local mailbox <address@.thing.domain.com>,
then finally <address@.domain.com>
Note
There is a period after the ´@´ character. If you want all mail for
“any.thing.domain.com” to be delivered as though it were sent to
“domain.com”, you should define an alias for the domain, for
example:
domain.com
.domain.com<TAB>domain.com
SEE ALSOesmtpd(8)[2].
AUTHOR
Sam Varshavchik
Author
NOTES
1. dot-courier(5)
[set $man.base.url.for.relative.links]/dot-courier.html
2. esmtpd(8)
[set $man.base.url.for.relative.links]/esmtpd.html
Courier Mail Server 02/10/2011 MAKEHOSTEDDOMAINS(8)
