>I found (at least) one userid within the *SENATE.GOV domain. >It had a host name of BOND. When doing a > > dig bond.senate.gov mx > >it pointed to the gateway.senate.gov. Okay, I've started looking into this address. I'm fairly certain that this subscriber was not on the list when the error message first started occuring (either that or I feel like a real idiot for overlooking him). Anyway, I'd like to thank everyone for the help. Brad Samek [log in to unmask]