[toaster] qmail-smtpd exiting with "status 256"

[Tom Collins]

I'm seeing something that I don't think I've seen before, and I'm  
wondering if there's something wrong on my server.

If I check /var/log/qmail/smtpd/current, I'm seeing some processes  
exiting with a "status 256" after chkuser but before I see any  
logging from simscan.

I don't have logs that go back more than a few days, so I can't look  
up whether I've always had messages like that or not.

It's concerning me because a customer is expecting legitimate email,  
and it's getting the 256 response.  I'm going to try to figure out  
how to use recordio and try to log a session to see if qmail-smtpd  
sends anything back to the sender that would help with troubleshooting.

Is anyone else seeing "status 256" in their logs?  Seen it in the  
past and know the cause?

-Tom