On Mar 8, 2008, at 10:15 , JB wrote: > >From RFC 2821, the last line says it all. ... > A domain name that is not in FQDN form is no more than a local > alias. Local aliases MUST NOT appear in any SMTP transaction. Point, set, match! :-) I'll edit the regex (which is copied from elsewhere anyway) to require a domain name. Thanks guys. :) -- pmj