[Mailman-Developers] Exim bouncedetection hack
Fri, 24 Sep 1999 09:40:43 +0100
> i've fiddeled around in Bouncer.py and added code to detect bounces
> created by exim.
> It's a bit of a dirty hack, as it is my first attempt at python ;-)
I hate to criticise since I haven't got around to cutting code to do
this and its great that you are working on this....
However I think that parsing the text of the exim bounces is the wrong
way to go - exim provides a header on bounce messages to make this sort
of function very easy. You will find that all bounce messages from an
exim system will have an additional header:-
Is there are multiple failed recipients, then they will look like this:-
You need to be slightly careful here though since a few mailers that
feel it is their duty to rewrite things will munge multiple addresses
onto a single line, so a general header address reading function should
I guess the other thing that should be done to finish up the job is to
detect exim delayed message warnings and ignore them. These have
subjects such as:-
Warning: message 11SzEO-0004wH-00 delayed 24 hours
The best way to detect these is by a regexp on the subject.
If you are getting a lot of these messages then it may be worth sending
a polite note to the admin of the system generating them suggesting
that they set the following config item:-
delay_warning_condition = "\
This prevents exim sending out message delay warnings for messages with
appropriate precedence header settings. This change is going to be
made the default for future versions of exim, but currently unless the
admin really knows what they are doing, most exim installations have
their configs for this non-optimal. Documentation on this option can
be found at
I'll try and code this stuff up using my appalling python skills soon.
I'll also attempt to add a mailman related section to the exim pages
soon - if it doesn't appear, bug me!
[ Nigel Metheringham Nigel.Metheringham@VData.co.uk ]
[ Phone: +44 1423 850000 Fax +44 1423 858866 ]