[TriLUG] steering at trilug.org

[matt at noway2.thruhere.net]

Alan,

I took a quick look at it and I want to compare some settings against my
server when I get home tonight.  I had a lot of trouble getting the grey
listing (policy check) and RBL to both function, and getting Squirrel mail
to not break.  It turns out that it is really sensitive to the order in
which the checks are made and if you don't have them in the right order,
the services don't function, but you don't get any errors.

I also looked at a full header of one of the messages I sent to the
mailing list and received back.  There is limited indication of scanning
by Pilot.  One thing in the header was:

Received-SPF: None (no SPF record) identity=mailfrom; client
ip=96.10.215.214;
helo=mrhandy.noway2.net; envelope-from=matt at noway2.thruhere.net  
receiver=trilug at trilug.org

This is suspicious to me because it claims that there is no SPF record.  I
know that I have SPF records and Domain keys (verified by mxtoolbox) and
that they validate against servers like Yahoo and Hotmail.  It looks like
the messages are being received and re-injected on localhost which
indicates the spamassassin SMTP queues in master.cf are working.

Have you grep'd the maillog for spamhaus and greylist recently to verify
that they are actively filtering?

>> will the mail system support any anti spam
>> measures and if so, what ones are currently in place?
>
> Yes, our postfix is set up to use RBL and greylisting.  Those
> two countermeasures cut down on a lot of junk, and what does
> get through is graded by spamassassin.  Interested members can
> use sieve rules to discard or sort mail based on SA score...
> you'd do that with a ~/.sieve file (see ~porter/.sieve for an
> example).
>
> If you'd like to see how postfix is set up, take a look at
> /etc/postfix/main.cf on pilot.
>
> Alan