Here is an excerpt from the smtp log: "Nov 29 23:28:55 2000 (457) All recipients refused: (111, 'Connection refused')

Looks to me like your MTA isn't running. Can you send mail outside of mailman from that machine? Do your MTA logs say anything?

Here is an excerpt from the qrunner log: "Nov 29 23:51:01 2000 (2960) Could not acquire qrunner lock Nov 29 23:52:01 2000 (2987) Could not acquire qrunner lock Nov 29 23:53:02 2000 (3025) Could not acquire qrunner lock Nov 29 23:54:01 2000 (3083) Could not acquire qrunner lock"

That looks like there are stale locks as well, probably resulting from the failure above

Here is an excerpt from the error log: "Nov 29 23:29:48 2000 (4735) thelist db file was corrupt, using fallback: /home/mailman/lists/thelist/config.db.last Nov 29 23:29:48 2000 (4725) thelist db file was corrupt, using fallback: /home/mailman/lists/thelist/config.db.last Nov 29 23:29:51 2000 (4720) thelist db file was corrupt, using fallback: /home/mailman/lists/thelist/config.db.last Nov 29 23:30:05 2000 (4736) thelist db file was corrupt, using fallback: /home/mailman/lists/thelist/config.db.last"

When I run check_db on "thelist" list the result state that it is fine. I am not sure of what is happening, can anyone point me in the right direction?

Those "corrupt" errors were from some time ago (about the same time the mail delivery failed). Was your machine very sick then (reboot, maybe?)