[Mimedefang] Blocking e-mail where the To does not match the envelope To

[Jon Kenoyer]

Thanks all for clarifying the interaction between envelope and the
e-mail fields.  We already run spamassassin and the e-mail was flagged
as spam, but due to the false positives that are returned I can not
simply bounce e-mails marked as spam.  Perhaps redirecting e-mails if
the spam assassin results contain the Porn marker would be a better
solution.

-----Original Message-----
From: Sidney Markowitz [mailto:sidney at sidney.com]
Sent: Thursday, August 29, 2002 10:16 AM
To: mimedefang at lists.roaringpenguin.com
Subject: Re: [Mimedefang] Blocking e-mail where the To does not match
the envelope To


Jon Kenoyer <jonk at otsi.com> asked:
> Could I add a rule to discard e-mails where the To does not match the
> actual recipients.  If so could someone post a quick sample?
> Are there cases where this could block legitimate e-mails?

Here are some headers from the above mail I received from you:

  From: "Jon Kenoyer" <jonk at otsi.com>
  To: <mimedefang at lists.roaringpenguin.com>

My MTA doesn't insert the envelope recipient in most cases, but I can
assure
you that it could not have been mimedefang at lists.roaringpenguin.com

In any case in which you are on a Bcc list, which is typically the case
in a
mailing list, your address will not show up in the To or Cc headers.

Anyway, if you are interested in rules for detecting spam I suggest that
you
just download SpamAssassin. It already works with MimeDefang and
benefits
from lots of people putting together hundreds of rules that can come up
with
an aggregate score to filter spam from nonspam.

 -- sidney


_______________________________________________
MIMEDefang mailing list
MIMEDefang at lists.roaringpenguin.com
http://lists.roaringpenguin.com/mailman/listinfo/mimedefang