[Mailman-Users] Big delays wrapper to delivery

[Nicolas Bertrand]

Hello

We have a few low volume mailing lists . We have been been happy with
the performance since instigating these (about a year and half ago) and
these mailing lists have become quite important. 
However, suddenly, delivery times to subscribers have increased to 8-12
hours and cannot figure out what has gone wrong...

Info:

1.MTA is postfix.
2.Mail gets received by the email server which then triggers 'wrapper
post'
Then it takes 8-12 hours to get the mail delivered.
3.This problem is specific to mailing lists (all the other mail is fine)
4. The load on the server is minimal
5. no locks
6. nothing in qfiles
7. no errors in ~mailman/logs
8. no error in maillog
9. qrunner is executed by cron every minute, no error is being
generated. Same thing, with running qrunner manually from the command
line.

Any ideas?

Nic