[Mailman-Users] No mail delivered

[James]

I can't understand these two logs. No mail makes it trough and this is
the only relelvant thing that I can see in the MTA logs. The second
log is a cron error. I've search the FAQ, read it, and I still don't
know how to troubleshoot this.

May  7 16:30:02 mail postfix/pickup[531]: 620D21002E8A: uid=1030 from=<mailman>
May  7 16:30:02 mail postfix/cleanup[619]: 620D21002E8A:
message-id=<20050507233002.620D21002E8A at mail.mydomain.org>
May  7 16:30:02 mail postfix/qmgr[532]: 620D21002E8A:
from=<mailman at mydomain.net>, size=1000, nrcpt=1 (queue active)
May  7 16:30:02 mail postfix/local[624]: 620D21002E8A:
to=<James at mydomain.net>, orig_to=<mailman>, relay=local, delay=0,
status=sent (delivered to command: procmail -a "$EXTENSION")
May  7 16:30:02 mail postfix/qmgr[532]: 620D21002E8A: removed

Also, every 5 min I get this email:
Traceback (most recent call last):
  File "/var/lib/mailman/cron/gate_news", line 284, in ?
    main()
  File "/var/lib/mailman/cron/gate_news", line 259, in main
    lock.lock(timeout=0.5)
  File "/var/lib/mailman/Mailman/LockFile.py", line 243, in lock
    self.__write()
  File "/var/lib/mailman/Mailman/LockFile.py", line 422, in __write
    fp = open(self.__tmpfname, 'w')
IOError: [Errno 13] Permission denied:
'/var/lib/mailman/locks/gate_news.lock.mail.607.0'