> I'm not sure. Before I read the rest of the queue I decided to play > with the server via telnet. It gives some interesting responses (eg
> the banner and the helo reply), and seems to just hang if you give it
> a whole bunch of "unimplemented" commands. That looks like a really
> bad implementation to me, and correlates with Tabor's explanation. A
> little more playing ... "ehlo" is unimplemented; a newline in a
> command causes the hang.
This is all good information to arm myself with when I do get their admins
on the phone. Thanks everyone for the help. Any more, of course, is
certainly appreciated.