Disappearing email - could be OT

[Steve Campbell]

I'm seeing a problem from a couple of my servers. I have a primary 
server for one of our domains, but I see emails coming through a 
secondary server for this domain. The email that gets sent through the 
secondary is relayed to the primary just fine.

The problem is that the primary accepts the email and then disappears. I 
see a line in my sendmail logs like the following:

On the secondary:
sendmail[17339]: r1BGGT8J017339: from=<xxxxxx at yyyyy.
com>, size=0, class=0, nrcpts=1, proto=ESMTP, daemon=MTA, 
relay=173-219-91-250.s
ta.suddenlink.net [173.219.91.250] (may be forged)

On the primary (relayed from the secondary above):
sendmail[31249]: r1BGGZCZ031249: from=<debbie at kcprc.com>, size=0, 
class=0, nrcpts=1, proto=SMTP, daemon=MTA, 
relay=mailserver1.cnpapers.net [10.0.0.103]

The logs above are for the same message. This is the only entries I see 
for this email in both logs. The email isn't delivered, logged through 
Mailscanner, and doesn't exist in the mqueue or mqueue.in directory.

Has anyone seen this type of problem before? How did it get solved? Any 
reason to believe there's a problem in  the processing database and how 
do I discover this?

thanks

steve campbell

Thanks for any