[exim-dev] [Bug 1066] interpret some 4xx error codes from re…

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Author: Andrey N Oktyabrski
Date:  
To: exim-dev
Subject: [exim-dev] [Bug 1066] interpret some 4xx error codes from remote server as permanent errors (5xx). Sometimes the Postfix MTA returns 4xx error when mailbox does not exist
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http://bugs.exim.org/show_bug.cgi?id=1066




--- Comment #14 from Andrey N. Oktyabrski <ano@???> 2011-01-16 13:28:57 ---
(In reply to comment #7)
> I think that an SMTP transport option of "upgrade_rcpt_4xx_to_5xx" which is an
> expanded string yielding a boolean and which gets the rcpt response line in a
> variable would be a good choice. Let the admins upgrade, make sure we log hard
> that the response was upgraded. Also include a variable which contains the
> SMTP banner text.

If this feature will be implemented, then the complementary
"downgrade_rcpt_5xx_to_4xx" needed too. Because the "5xx Over Quota" response
happens not once nor twice. It is not violates the standard, but when I have
large mailing list and wish to delete dead addresses from it automatically, I
prefer the 4xx responses for the temporary errors same as "Over Quota".


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