Kai Henningsen <kaih(_at_)khms(_dot_)westfalen(_dot_)de> writes:
Personally, I think we should investigate having those filters available
as a general tool, not just an anti-spam filter.
An interesting question would be "how do I determine if a given DSN is for
mail that I've personally sent?" An MUA that can answer that question and
filter out DSNs that aren't for mail that I've sent would be very useful,
although in some cases it's necessary to reject the mail at the SMTP level
due to the sheer level of traffic when widespread forgery is happening.
--
Russ Allbery (rra(_at_)stanford(_dot_)edu)
<http://www.eyrie.org/~eagle/>