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Re: 4yx response code, MTA should <help me?>
From: Wietse Venema (wietse
porcupine.org)
Date: Mon Feb 06 2006 - 00:55:41 CST
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Bob Tanner:
> Have a very busy mailing list server running postfix, that frequently
> returns 4yz to sending MTAs.
>
> The way I understand the RFC, the sending MTA should (must?) retry my
> mailing list server "later" if a 4yz code is returned?
>
> When postfix is the sending MTA it does the "right" thing. Later, I see the
> sending postfix retry my mailing list server.
>
> BUT sendmail, moves to the next mx host on a 4yz code. Speaking with the
> sendmail MTA owner, I was told postfix implementation of RFC 2821, Section
> 5, paragraph 2 is "wrong".
>
> Looking for clarification. Thanks.
Are you running any particular Postfix version?
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