MailScanner has gained an interesting optimization recently, that may be
worth adding to Exim. It takes a checksum of the message body, and if that
matches the checksum of a message that has already been received it skips
the full SpamAssassin and anti-virus scan and instead pulls the results
out of a cache. This seems to be more effective than you might expect,
even without any kind of fuzzy-matching in the checksum.
Tony.
--
f.a.n.finch <dot@???>
http://dotat.at/
BISCAY: WEST 5 OR 6 BECOMING VARIABLE 3 OR 4. SHOWERS AT FIRST. MODERATE OR
GOOD.
