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Re: 2821bis and address rewriting (was: Re: Fixing graylisting [was TBR])

2007-11-21 12:40:07

On Mon, 19 Nov 2007, Valdis(_dot_)Kletnieks(_at_)vt(_dot_)edu wrote:

Seems people have problems wrapping their tiny little brains around the
idea that <> is useful for other things - in this particular case, it
was a mailing list manager that sent out all the "Please reply to this
message to confirm your request" messages with <> specifically because
it did *not* want to hear back if there was a problem (as the request
would just time out all by itself anyhow).

I don't think that is a valid use of a null return path. RFC 2821 section
4.5.5 says:

   All other types of messages (i.e., any message which is not required
   by a standards-track RFC to have a null reverse-path) SHOULD be sent
   with with a valid, non-null reverse-path.

and the list of standards-track specifications is just DSNs (RFC 3461),
MDNs (RFC 3798), and vacation messages (RFC 3834).

Tony.
-- 
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