[Mailman-Users] Mailman not delivering.

[Dan Mick]

> SMTP log
> 
> Feb 19 19:09:02 2001 (16657) All recipients refused: host not found
> Feb 19 19:09:02 2001 (16657) smtp for 5 recips, completed in 0.144 seconds

This is clearly sendmail refusing the mail.  You need to find out why.
 
> SMTP-FAILURE log
> 
> Feb 19 19:10:05 2001 (16666) -1 user at domain.com (ignore)
> Feb 19 19:10:05 2001 (16666) -1 another_user at domain2.com (ignore)
> 
> System is RH 6.2 running Sendmail which isn't reporting any errors in it's logs.

Is its error-logging turned on?  It must be the culprit.

Sometimes I try strace/truss/ktrace on the running sendmail process to get to the
bottom of such problems.