[CentOS] Recommend Mail Server
thomas-lists at nybeta.com
Thu Nov 26 02:00:34 UTC 2009
On 11/25/2009 6:45 PM, Christopher Chan wrote:
> Thomas Harold wrote:
>> We use postfix, dovecot, clamav milter (reject at SMTP time), spf policy
>> check (with rejecting on SPF_FAIL at SMTP time), and AmavisD-New w/
>> SpamAssassin for scoring what's left.
> Have you looked at spamass-milter too?
No, I must have overlooked that.
We're taking advantage of a lot of the amavisd-new features that enhance
SpamAssassin. OTOH, spamass-milter looks to be a lot simpler to
configure and would've allowed us to reject the super-high scoring spam
(>=25.0) during the SMTP transaction.
(I prefer to only reject on bogus HELO names, virus-infected messages
caught by ClamAV and SPF_FAILs at the moment. Rejecting on a spam score
is trickier and more subjective.)
One advantage of amavisd-new is that we could, if needed, move the spam
scoring off to a secondary internal server and round trip it back to the
primary mail server. There are some other tricks that amavisd-new
handles beyond that (such as the policy banks, or the ability to
boost/lower a sender's email address or a sender's domain by a few
points instead of outright whitelisting/blacklisting).
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