------- You are receiving this mail because: ------- You are on the CC list for the bug.
http://bugs.exim.org/show_bug.cgi?id=1066 Phil Pennock <[email protected]> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |[email protected] --- Comment #7 from Phil Pennock <[email protected]> 2011-01-13 10:09:51 --- [original response discarded; Graeme pointed to the retry rules; I'll just note that you're looking for "32.5 Retry rules for specific errors" in The Spec] There's room for disagreement here. I think I'm in the minority of the Exim Devs with my view, but I'm not opposed to having an option to *upgrade* the severity of an error. An arbitrary facility to change the response code is bad, as it would lead to people treating 5xx as 4xx which would cause them to become abuse emitters. A facility to permit an admin to treat 4xx as 5xx is not causing abuse to others and permits the owner of a system to retain control over their own system. Email is a cooperative venture and nobody should be *forced* to consume resources on behalf of someone else -- whether their systems are broken or not. While fixing the other systems is ideal, robustness in a networked system of autonomous systems means that we need to be able to deal with brokenness elsewhere in a sane way. I do not think we should hard-code something in the way this patch does. I'd be happier if we had something like the ACL language for dealing with outbound connections, so that the admin could script the response. 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. upgrade_rcpt_4xx_to_5xx = ${if and{\ {match{$remote_banner}{\N\bPostfix\b\N}}\ {or{\ {match{$rcpt_response_text}{\N^Recipient address rejected: User unknown\N}}\ {eq{$rcpt_response_text}{unknown user account}}}}} {yes}{no}} As is evident, this is contentious and not everyone would agree, but I'd be prepared to argue in favour of submitting such a feature. -- 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/ ##
