Am 28.03.2012 14:06, schrieb Rafał Radecki: > Hi all. > > Currently we have some amount of spam with different Return-Path and From > fields. What to do to filter it? Should > it be done in postfix (at mta level) or maybe in spamassassin? I think that > SPF could be used but what about > domains which do not have proper spf records?
this differences are totally normal (mailing-lists, SRS...) on the MTA side "From:" does not matter in any way in other words: you can NOT reject a message because of this difference alone because you would reejct also some legit mail
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