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http://bugs.exim.org/show_bug.cgi?id=1066
--- Comment #5 from Graeme Fowler <graeme@???> 2011-01-13 09:37:30 ---
(In reply to comment #4)
> I agree too: this feature is not good. But this Postfix behaviour is really
> annoying. What I can do with "4xx mailbox does not exist" response? Add another
> HDD for my outbound queue? Maybe we need the configuretion option something as
> "wrong_4xx_workaround" in transports? Why we have the "helo_allow_chars" option
> (which is really needed in the real world) but cannot do anything with wrong
> smtp codes?
Add or amend a retry rule for 4xx errors from the affected domains so they are
retried for a shorter period before being NDR'd.
As for the "helo_allow_chars" option - that was because a very widely deployed
"MTA" (I use the term advisedly) was deployed with the instruction to use
underscores in the hostname.
Graeme
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