Any message headers can be filtered. On my own server, most of my filters are
for "From" and "Subject", but one very persistent spammer recently forced me to
add a "To" filter as well. I try to add as few header filters as possible, but
it just depends what the incoming spam looks like.
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That's very unusual, it sounds like a setting on their server. It's been a
long time, but I remember a setting on old sendmail servers that would send an
"advisory message" if an email had been sitting in the queue too long. It was
just a "by the way" notice (and it always confused every user
Hi
Which are the valid headers to filter ?
I think, the obviuos ones are:
FROM
SUBJECT
REPLY-TO
But..
Return-Path:
Message-ID:
Received:
List-*
Are allowed ?
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A client using our Spamdyke-enabled mail server has reported someone sending
them an email received a "bounce" message notifying the sender that the
messages has been graylisted (see the delivery failure notification below).
They did receive the message (graylisting works well for us).
This is
