[TriLUG] Sendmail tweak for fast local queueing of mail for mailinglist etc.

[Jon Carnes]

My favorite kind of tweak, simple and straight forward.

From: Chuq Von Rospach:

You can do this without modifying your sendmail files at all. Instead, in
your startup script, add another sendmail process:

        /usr/sbin/sendmail -bd -ODeliveryMode=defer \
                -ODaemonPortOptions=Name=MSA,Port=NNNN,M=E,Addr=127.0.0.1

Where NNNN is some port number not otherwise used (you can test if
something's in use by doing "telnet localhost NNNN" -- if it's refused,
there's no daemon listening)

This sets up a sendmail process listening to the alternate port, in DEFER
mode, but set to talk only to the localhost interface, so it's not
accessible by anyoneother than your local machine: no open relay problems.

To make mailman access that port, add this to your mm_cfg.py:

# define alternate SMTP port
SMTPPORT = 1313


I've been running this fine for about a week, and I'm quite comfortable with
it. It works with sendmail 8.10 and later and doesn't require a sendmail god
to implement.