12 Dec
2005
12 Dec
'05
6:08 a.m.
This assumes all messages are rejected within the SMTP session.
Yes, exactly and the point several of us have been making is that this is (a) easy (well, provided you're using a quality MTA; if not, then switch to one) (b) running a sane mail system (c) fast (d) resource-friendly and
(e) most important of all, the _only_ way to avoid sending UBE in response to forgeries (which are not going away any time soon or quite possibly ever).
Not quite the only way. If a postprocessing step is needed, it is trivial for the SMTP server to record any return path info that it knows in order for the post-processor to be able to send DSN's as accurately as the SMTP server itself. What we have here is yet another failure of imagination. --Michael Dillon