> Usually the easiest thing with this sort of issue is to run sendmail in
> rule testing mode ---
> For example ---
>
> sendmail -bt
>> /parse admin at lctn.org

That didn't help me, but from tailing the maillog I can see my mailertable
is being ignored by sendmail, even though it has been changed to the IP of
the new server and MailScanner has been restarted.