[Mailman-Users] Bounce processing not working

[Lindsay Haisley]

I have a list (several lists, actually) running on Mailman 2.1.11 and it
looks as if bounce processing is broken.  On the list in question, the
following are set:

bounce_processing = Yes
bounce_score_threshold = 1.0
bounce_info_stale_after = 1
bounce_you_are_disabled_warnings = 0
bounce_you_are_disabled_warnings_interval = 7

/var/lib/mailman/logs/bounce shows many entry lines of this form, in
sets of 3 as shown below:

Aug 11 12:35:24 2009 (19017) listname: user at hotmail.com bounce score: 1.0
Aug 11 12:35:24 2009 (19017) listname: user at hotmail.com disabling due to bounce score 1.0 >= 1.0
Aug 11 12:35:24 2009 (19017) listname: user at hotmail.com deleted after exhausting notices

However, looking at the subscription roster or grepping for
user at hotmail.com using list_members indicates that the user is still
subscribed, with no nomail flag set, and no notice is sent to the list
owner.

I'm running mailman on Gentoo Linux which uses:

PREFIX          = '/usr/lib64/mailman'
VAR_PREFIX      = '/var/lib/mailman'

Does anyone have any idea how to troubleshoot this?

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