Re: [exim] Callouts, NULL DSN

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Autor: Nigel Metheringham
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A: exim-users
Assumpte: Re: [exim] Callouts, NULL DSN
On Mon, 2005-08-22 at 13:17 +0100, David Woodhouse wrote:
> To do a header_sender callout with a null sender is broken, as Steve B
> discovered. The RFC2822 sender address may never be used as an RFC2821
> sender, and may reject all bounces.


As an example think about this list.  The address <exim-users@???>
is never ever used to send mail (mail going to you will instead have a
sender address of <exim-users-bounces+...@exim.org>), so attempting a
call out verify of the address will cause the following:-
        MAIL FROM: <>
        250 OK
        RCPT TO: <exim-users@???>
        550 "Recipient never sends mail so cannot cause bounces"


If you are trying to do call out verification of this address then
either:-
     1. You received a forged message in the first place (so its not my
        problem).
     2. You are extracting addresses from headers (so thats your
        problem).


    Nigel.
-- 
[ Nigel Metheringham           Nigel.Metheringham@??? ]
[ - Comments in this message are my own and not ITO opinion/policy - ]