On Thu, 8 Oct 1998, Vaudreuil, Greg M (Greg) wrote:
VPIM, RFC 2421 suggests using:
non-mail-user(_at_)domain
for unrepliable messages. In this case, message originating from a
telephone-answering application cannot be replied to.
RFC 2421 prohibits replies to this special-case address by conforming
systems.
Hopefully most implementors will ignore that prohibition on the grounds it
violates the more important full-standard requirement (RFC 1123, 5.2.16)
that the local-part is uninterpreted except by the system named on the
right-hand-side.
I definitely prefer the empty group address for this purpose:
Reply-To: Please Don't Reply:;
It fits RFC 822 syntax and has an obvious interpretation without any
layering violation.
- Chris