Bruce Lilly wrote in <ietf-smtp.imc.org>:
Dave Crocker wrote:
Well, this is interesting. I believe the intent of rfc2822
is to characterize the id-right field as either a domain
name or an ip address. But it appears that it does not say
that.
It is a domain name or domain literal. RFC 2822 introduces
different grammar productions form those used in angle-addr
to enforce syntax requirements (no line folding in
identifiers) but does not change the semantics (RFC 2822
clearly so indicates).
Quote forwarded to the UseFor mailing list for personal reasons.
Bye, Frank