Roderick A. Anderson:
> I'm starting to get a lot of SPAM where the Sender matches the To:.
You mean, the From: and To: headers, or the MAIL FROM and the RCPT
TO address in SMTP commands?
Note that From: and To: headers can be completely different from
the MAIL FROM and the RCPT TO address in SMTP commands.
See, for example, this message that reaches you via mailing lists.
Header:
From: me
To: postfix-users@postfix.org
SMTP envelope:
MAIL FROM: [EMAIL PROTECTED]
RCPT TO:you
If your problem is that From: equals To:, then Postfix can help
only with an external content filter.
If your problem is that MAIL FROM equals RCPT TO, then Postfix can
help only with an external policy daemon or external content filter.
Wietse
