Messages On Startup

[Jonathan de Boyne Pollard]

p> I don't see why underscores should be used AT ALL, there have been
p> at various times problems, it _is_ against RFC.

No, it isn't.  Read RFC 2181 section 11 again.  Underscores are illegal 
in _host_ names, and in the domain portions of SMTP mailbox names; but 
they are perfectly acceptable in domain names.  A flat ban on 
underscores in domain names is not in conformance with the standards.