markk@internic.net (Mark Kosters) writes:
> Edu.com, the perennial favorite, is one of these domains.
> However, I would not advocate that name. Perhaps example.com or
> reserved.com?
I'm assuming that you and Mr. Barton are discounting the possibility
of using "domain.com" since it's already registered. You are, in
fact, welcome to use it in examples, since all we do with it is
explain to people from whom we get mail on user@domain.com and
user@host.domain.com how to reconfigure their email gateways (since
that's generally what's misconfigured, that or return addresses) so
that they'll work. We registered it as something between a joke and a
public service.
Alternatively, if you'd like to maintain some sort of purity, we can
relinquish the domain back to the NIC for a good cause like this, with
the caveat that you'll get a lot of mail from clueless people who want
to know why you've hijacked their email. 
-Bill Woodcock