On Wed, May 02, 2007 at 10:03:48AM -0400, David F. Skoll wrote:
For example, we have an e-mail address "sales(_at_)roaringpenguin(_dot_)com"
that's only used for inbound mail; we never send mail from that
address. Being able to specify via DNS that MAIL
FROM:<sales(_at_)roaringpenguin(_dot_)com> is a forgery would be useful.
You already can, using SPF and its macros.
HTH
Alex