[Mailman-Users] Mailman bounce counters and delivery of spam

[Stephen J. Turnbull]

Albert ARIBAUD writes:

 > But is there a way (besides patching and recompiling) to let mailman 
 > know that 5xx (and possibly 4xx as well) rejects which mention spam 
 > should not cause an increase of the bounce counter?

4xx should be handled at the MTA level by retrying.

If I were you, I'd fix the spam problem by improving the spam filters
in front of Mailman.  Eg, move the list to free.fr, which apparently
has better spam detection than your Mailman host does.