[RFCI-Discuss] Bounces to header sender

[Matus UHLAR - fantomas]

On 01.12 16:41, Alex van den Bogaerdt wrote:
> On Mon, Dec 01, 2003 at 03:02:44PM +0100, Andrzej Filip wrote:
> > Do you think a new map should be created for domains which send bounces to 
> > header sender (From: header) instead of envelope sender (Mail From:) ?
> > 
> > It shows up when delivery recipe is sent with envelope sender set to <> but 
> > the site sends bounces to sender mentioned in From: header.
> 
> AFAIK it is valid for email to enter an smtp-to-bla gateway where
> "bla" does not talk SMTP.  This means the envelope would be destroyed
> so how would that "bla" system send a bounce to the envelope sender...

well, rfc2821 describes in section 3.8.1 that

  when a message leaves the Internet
   environment, it may be necessary to fold the SMTP envelope
   information into the message header.  A possible solution would be to
   create new header fields to carry the envelope information (e.g.,
   "X-SMTP-MAIL:"  and "X-SMTP-RCPT:");

and in section 3.8.5:

3.8.5 Envelopes in Gatewaying

   Similarly, when forwarding a message from another environment into
   the Internet, the gateway SHOULD set the envelope return path in
   accordance with an error message return address, if supplied by the
   foreign environment.  If the foreign environment has no equivalent
   concept, the gateway must select and use a best approximation, with
   the message originator's address as the default of last resort.

> Then again: Yes, I do think such a map would be welcome.  Not sure
> if rfci is the place.

I agree with creating such map (I've asked for it, not once) and I think
rfci IS the place - many of such mailers violate the RFC.
- they often don't send DSN's with null reverse-path
- they respond to DSN's (with correct null reverse-path)


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