[Exim] exim problem

I have 118 msgs sitting in /var/spool/exim/input That are frozen, all with
the same error:

11oG5a-0006tw-00
::::::::::::::
1999-11-17 17:10:18 user@???: lookuphost router deferred:
lowest numbered MX record points to local host
*** Frozen ***

The master file in /var/named for this domain is identical to three other
domains on my box which are happily accepting mail. Any ideas?
All of the frozen mails are from the bugtraq mailing list, emails from
other domains are getting through just fine.

Exim 2.05 #1.

-Mark (going to mail bugtraq admins now)