Eric Diamond's Bounced Email

[Bob Chiodini <chiodr@xxxxxxxxxxxxxxxxxxx>]

Is anyone else receiving Symantec Email bounces for mail destined to
Eric Diamond, with the Subject:

Symantec Mail Security detected that you sent a message containing a
suspicious attachment.                                       
(SYM:26928511170082593535)

I don't think I've attached anything suspicious.  As a test, I removed
the PGP signature.

Bob...