RE: domain name definition in RFC2821

| Cc: Yuri Inglikov <Yuri(_dot_)Inglikov(_at_)microsoft(_dot_)com>, 
Valdis(_dot_)Kletnieks(_at_)vt(_dot_)edu,
|    williamatelannet <william(_at_)elan(_dot_)net>, 
ietf-smtp(_at_)imc(_dot_)org

I'm curious which of your systems collapsed the "pretty name" part of my 
email address from "william(at)elan.net" into the above?
--
William Leibzon
Elan Networks
william(_at_)elan(_dot_)net