[NMLUG] postfix+spamassassin

[aaron at boim.com (aaron@boim.com)]

I think I have spamassassin running with postfix.
It seemed to correctly tag the sample mails...  but missed some
real spam.  I need to work on training and/or CPAN use.

To summarize for archives:

1) Make a user named mailfilter
2) crate : -rwxr-xr-x    1 mailfilt staff          64 Oct 25 13:19
/usr/local/bin/postfixfilter
    containing:

#!/bin/bash
/usr/bin/spamc | /usr/sbin/sendmail -i "$@"
exit $?

3) make sure that spamd is running.
   (it is started from the spamassassin script with debian)

4) change the smtp inet line in /etc/postfix/master.cf to:
    smtp inet n - n - - smtpd -o content_filter=spamassassin:

5) add this line to the end of master.cf
    spamassassin unix - n n - - pipe flags=Rq user=mailfilter
    argv=/usr/local/bin/postfixfilter -f ${sender} ${recipient}
I dunno if this is maximally secure.  It follows the post from
some yahoo on the internet.  (unreliable source)

I tried several other methods (some which do not use spamd)
but failed.  This might be working, so I'll stick with it.

I guess I will try to get SpamAssassin trained/configured... and
when it seems to me working, I'll play with procmail.
I prefer to move one step at a time, with ample testing...

           aaron