Re: [EXIM] transport_filter for incoming SMTP

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Author: Philip Hazel
Date:  
To: Ilya Ketris
CC: exim-users
Subject: Re: [EXIM] transport_filter for incoming SMTP
On Wed, 14 Oct 1998, Ilya Ketris wrote:

>         I wonder if there is any possibility of
>         hooking a filter on the processing of the
>         incoming SMTP messages, in the way it's
>         done by the transport_filter option.


Suggestion noted, but..

>         I would prefer to say a spammer or a relay site
>         "no" in the way they'd see this, rather then
>         silently disposing the message after telling
>         the sender that it was "250 OK".


The result would be to send 5xx after receiving the data (that is, it
would be received by the sender after sending the terminating "."). It
is well known that many MTAs do not treat this as a permanent error.
They just try to send the message again later, for days and days. So the
facility might well not achieve what you want.

-- 
Philip Hazel            University of Cambridge Computing Service,
ph10@???      Cambridge, England. Phone: +44 1223 334714.



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