Elizabeth Schwartz wrote:
IMHO if a rule is getting legit email tagged as SPAM it should be toned down. Obeying the RFC's is a good thing, but I am trying to tune our spam filter to filter spam, not to be a netcop. Our particular contact seems to have gotten onto rfc-ignorant's list because it is rejecting mail from <>, nothing to do with sending spam, and it's a legitimate site, neither a spammer nor an ISP (nor in a computer related field, nor English speaking...)

It seems to me you have a couple of different options, Betsy. You can reduce the score attached to all mail that trips the rfc-ignorant rule, you can set it to zero and deactivate the rule entirely, or you can whitelist particular senders in a custom .cf file. I usually choose the latter route, most often based on the Received headers. For instance,

header RCVD_FROM_HARVARD        Received =~ /from .*\.harvard\.edu \(/i
score RCVD_FROM_HARVARD         -5

matches the Received header added by sendmail. If you're using a different MTA, you'll need to write a rule customized to the headers it adds. (Note the escaped periods and parenthesis in the regex.)

You might drop a note to the postmaster box at that domain and tell them they're listed in rfc-ignorant. I bet they haven't got a clue, and some of their other legitimate messages aren't being delivered.

Peter

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