[Mimedefang] Greylisting++
Kees Theunissen
theuniss at rijnh.nl
Mon Jul 9 22:58:45 EDT 2007
On Mon, 9 Jul 2007, John Rudd wrote:
> I've often wondered about including the message-id in the tuple, as
> well as trying to track the same message-id coming from different
> senders, and whether or not that's a usable spam-sign.
In case of mailing list trafic you should be prepared to receive the
same message from two different envelope senders if someone replies
to your message with "To: list" and "Cc: you". In both cases the
"From:" message header will be the same, but you need to implement
greylisting after the SMTP DATA command to be able te inspect the
"From:" message header.
Regards,
Kees
--
Kees Theunissen
F.O.M.-Institute for Plasma Physics Rijnhuizen, Nieuwegein, Netherlands
E-mail: theuniss at rijnh.nl, Tel: (+31|0)306096724, Fax: (+31|0)306031204
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