sendmail, 4th Edition

*file* and *include*

Internal delivery agents V8.1 and later

The *file* delivery agent (the * characters are part of the name) handles delivery to files. The *include* delivery agent handles delivery through :include: lists. Neither can be considered a true delivery agent, however, because actual delivery is still handled internally by sendmail. Instead, they provide a way to tune delivery agent behavior for these two delivery needs.

The defaults for these delivery agents are predefined. They can be viewed with the following command (note that output lines are wrapped to fit the page):^[272]

% /usr/sbin/sendmail -d0.15 -bt < /dev/null | egrep "file|include"
mailer 1 (*file*): P=[FILE] S=parse/parse R=parse/parse M=0 U=0:0 F=9DEFMPloqsu L=0 E=
\n T=X-Unix/X-Unix/X-Unix r=100 A=FILE $u
mailer 2 (*include*): P=/dev/null S=parse/parse R=parse/parse M=0 U=0:0 F=su L=0 E=\n
T=<undefined>/<undefined>/<undefined> r=100 A=INCLUDE $u

These predefined defaults can be overwritten, however, by declaring *file* and *include* in the configuration file. For example, the following configuration file declaration overrides the internal definition shown earlier, and limits the size of any mail message that is delivered to files to 1 MB:

M*file*, P=[FILE], M=1000000, F=9DEFMPloqsu, T=X-Unix/X-Unix/X-Unix, A=FILE $u

Note that any delivery agent equate that does not default to zero (such as the P=, F=, T=, and A= delivery agent equates) needs to be copied to this configuration file declaration, or the original ...