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http://bugs.exim.org/show_bug.cgi?id=1066 --- Comment #16 from Ted Cooper <[email protected]> 2011-01-16 14:04:42 --- I'm sorry, but this is insane. We're talking about deliberately coding to allow for blatant abuse of the SMTP protocol here. Even if it's hidden away, this just allows for too much abuse. If the other end is configured to sent 4xx, it should be treated as such. If you know that a server is returning an erroneous 4xx when it should be returning a 5xx, add some specific retry rules and contact the postmaster to fix their server. A temporary fix to something that is a misconfiguration. If the other end is configured to send 5xx, again, it should be treated as such. If someone gets a 5xx from my servers and instead of leaving it alone keeps on trying to send again and again, I'll put them in the same bucket as all the other connections that looks like that - spammers. Well known and expected behaviour is the only way that these protocols continue to work. The codes are not up for interpretation. 4xx is temporary, 5xx is permanent. If mail admins have configured their mail servers to return those codes, they have to be respected. There's no way to second guess things reliably. -- Configure bugmail: http://bugs.exim.org/userprefs.cgi?tab=email -- ## List details at http://lists.exim.org/mailman/listinfo/exim-dev Exim details at http://www.exim.org/ ##
