Discarding spam on a relay??

Hello,

I have a relay which I receive email from the Internet, scans for
viruses and spam then forwards all mail to my internal servers for
delivery. It has no local users, it just forwards...

I'm running Spam Assassin and would like to discard mail with a spam
score greater than a 9.0.

I don't think procmail will work since I don't have any users... I
could be wrong here... What technique should I use to accomplish my
goal?

Thanks in advance,

Mike

n0prob71@yahoo.com (Mike) writes:

> I have a relay which I receive email from the Internet, scans for
> viruses and spam then forwards all mail to my internal servers for
> delivery. It has no local users, it just forwards...
>
> I'm running Spam Assassin and would like to discard mail with a spam
> score greater than a 9.0.
>
> I don't think procmail will work since I don't have any users... I
> could be wrong here... What technique should I use to accomplish my
> goal?

You could use a virtualdomains entry to deliver the mail locally, use
procmail in the domain's .qmail-*-default file to filter out spam, and
use maildir2smtp from the serialmail package to forward the good
messages on to an internal server.

--
Dave Sill Oak Ridge National Lab, Workstation Support
Author, The qmail Handbook <http://web.infoave.net/~dsill>
<http://lifewithqmail.org/>: Almost everything you always wanted to know.

Mike <n0prob71@yahoo.com> wrote:
> Hello,
>
> I have a relay which I receive email from the Internet, scans for
> viruses and spam then forwards all mail to my internal servers for
> delivery. It has no local users, it just forwards...
>
> I'm running Spam Assassin and would like to discard mail with a spam
> score greater than a 9.0.
>
> I don't think procmail will work since I don't have any users... I
> could be wrong here... What technique should I use to accomplish my
> goal?
>
> Thanks in advance,
>
> Mike




You could put spamassassin in a qmail-queue replacement script like:

-----8<-----8<-----8<------8<------
#!/bin/bash
#
/var/qmail/bin/spamc | /var/qmail/bin/mailanalyze |
/var/qmail/bin/qmail-queue.real
-----8<-----8<-----8<------8<------

"mailanalyze" would search the header for the spamassassin's header line and
the "******" rating.
You could archive those messages as well here.

minimum "mailanalyze":
-----8<-----8<-----8<------8<------
#!/bin/bash
#
datum=`date +%Y%m%d_%H%M%S`
TMPFILE=/tmp/mail-analyzer_$datum.tmp_$$
cat > $TMPFILE
# put analyzing in here
# should be fast as possible in case of restarting the machine etc.
# (current mail would be lost)
cat $TMPFILE
-----8<-----8<-----8<------8<------


qmail-queue.real is the original qmail-queue binary


Or use two spamassassins, one with configuration="tagging", the other one
with "deletion", set to different score thresholds.


Best regards
Thomas.