Well, this proved trivial enough to do, but is such a neat
arrangement that I thought I’d summarise it for the list.
SpamAssassin (www.spamassassin.org) is a mail filter to identify
We, like many others no doubt, receive a lot of spam to RT
queues. And we don’t like it. (I know Bruce has also mentioned
this kind of thing before.)
Since we’ve been trialling SpamAssassin for end-user delivery
on (conveniently) the same host that RT runs on, I decided to
put RT behind SpamAssassin as well.
Rather than reject or lose any detected spam, I chose to shunt
it into its own queue for review and disposal. Of course others
may choose differently; this is very simple to change.
The procedure (under FreeBSD, using Sendmail at least) is very
procmail must be installed.
spamassassin must be installed (duh!), spamc/spamd installed,
and spamd running. (If you don’t want to use spamc/spamd,
replace the “spamc” command with the appropriate "spamassassin"
command in the attached procmailrc.)
The user running spamassassin (I chose the MTA’s "mailnull"
user) must have (or have permission to create) a .spamassassin
directory under his home dir. This was the only roadblock I
hit (as spamassasin’s “spamc” silently does nothing if this is
not the case.)
chown mailnull ~mailnull/.spamassassin
(other OSs will be similar.)
Create a “spam” queue in RT, make sure “everyone” has the right
to “create ticket” and season other rights to taste.
Drop the attached procmailrc into /usr/local/etc/procmailrcs/rt
and correct any paths for your local installation. Change the
ownership of this file to your chosen user (“mailnull” in the
Change the alias for each queue you wish to protect. For example,
assuming I have a queue called “test”, with correspond address
"firstname.lastname@example.org" and comment address "email@example.com", I’d
use the following:
test:"|/usr/local/bin/procmail -m /usr/local/etc/procmailrcs/rt test correspond"
test-c:"|/usr/local/bin/procmail -m /usr/local/etc/procmailrcs/rt test comment"
That’s it! Told you it was simple.
Variations to the procmailrc:
- Change “spamc” to “spamassassin -P” if you don’t use spamd.
- Change the “X-Spam-Status: Yes” delivery rule to bounce, or
blackhole, or deliver to mailbox, or whatever, if you don’t
want a “spam” queue. The choice is yours!