Re: [Exim] Rejecting bounce messages with multiple recipient…

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Lähettäjä: Marc MERLIN
Päiväys:  
Vastaanottaja: Mike Meredith
Kopio: exim-users
Aihe: Re: [Exim] Rejecting bounce messages with multiple recipients
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On Mon, Sep 23, 2002 at 04:14:38PM +0100, Mike Meredith wrote:
> RFC2505 2.6.1 specifically says that you MUST NOT block "<>" with
> multiple recipients because there are sometimes occasions when a bounce
> should go to multiple recipients (it mentions list aliases).
>
> As I'm pretty sure I don't have senders with multiple recipients, it's
> tempting to ignore that bit of the RFC (did I really say that?) and go
> ahead.


Just for reference, when I wrote my patch to do SMTP callbacks on the sender
*and* postmaster@remotedomain, I noticed problems within the first day. Some
mail servers were refusing the second callback because they refused more
than one receipient for the null envelope.
I quickly modified my callback code to issue a RSET and a second FROM/RCPT
TO to avoid that problem.

Whether it's legal or not, it's something that's done quite commonly
already, and I can't say that the people who do this are that wrong.

Marc
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Microsoft is to operating systems & security ....
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Home page: http://marc.merlins.org/   |   Finger marc_f@??? for PGP key
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