How do I stop spam that uses my users email address as the sender?

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1

I have been getting a number of spam emails where the sender and the user are the same. I gets right through Spamassassin because it ranks it as -80 or thereabouts.

What I have noticed is that in he headers Return-Path: <> is the junk sender. So how can I stop this and have SA actually check the RP before sending it on. Any other ways to stop this?

Thanks as always.

2

Use the learning function in spamassassin, submit it several e-mails of that kind, it should stop. But basically, if mail is sent by someone else, you can’t control anything except checking it normally.

See this : http://wiki.apache.org/spamassassin/BayesInSpamAssassin