aliases(4)aliases(4)NAMEaliases - Contains alias definitions for the sendmail program
By default, the aliases file contains the required aliases for the
sendmail program. Do not delete these defaults because they are needed
by the system. This file describes user ID aliases used by the sendmail
command. It is formatted as a series of lines in the form:
name:name_1, name_2, name_3,..
The name is the name that needs an alias, and the name_n are the
aliases for that name. Lines beginning with white space are continua‐
tion lines. Lines beginning with a # (number sign) are comments.
You can define an alias only on local names. Duplicate addresses are
removed and no message is sent to any person more than once. For exam‐
ple, if name_1 defines an alias that is name_2 and name_2 defines an
alias that is name_1, sendmail does not send the same message back and
forth. Local and valid recipients who have a file in their home direc‐
tory have messages forwarded to the list of users defined in that file.
This is only the raw data file; the actual information that defines the
aliases is placed into a binary format in the files /var/adm/send‐
mail/aliases.dir and /var/adm/sendmail/aliases.pag using the newaliases
command. For the change to take effect, the newaliases command must be
executed each time the aliases file is changed.
The sendmail program also supports sending messages to programs or
appending a message to a file. See the sendmail(8) reference page for
Directs error messages that occur when sending to aliasname back to
Aliases for sendmail use the dbm(3) database format for faster lookups.
A single alias cannot exceed 1,000 characters. To work around this
restriction, you can chain together aliases. For example:
alias-list: ali1, ali2, ali3 ali1: name 1, name 2 ... ali2: name n,
name n + 1
Binary aliases file. Binary aliases file.
Commands: newaliases(1), forward(4), local.users(4), sendmail(8)aliases(4)