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Re: Your setting Return-Path to YOU in your cygwin@cygwin postings


--On Thursday, March 05, 2009 13:27:56 +0000 Dave Korn wrote:

  This is how the internet has always worked: someone proposes an idea,
some other people support it in software, everyone tries it out and if it
works good it gets widely-adopted.  The whole standardisation process is
very much an after-the-fact matter of documenting what the de facto
standards are and providing a gold-standard for interoperability so that
any little misaligned wrinkles between the various implementations can be
ironed out.

If the idea had been proposed this century...


  The most widespread use is in NDRs, which add "Return-Path: <>" so that
you don't get bounces, loops and explosions of NDRs for NDRs for NDRs and
so on.

The Return-Path header would be used only if a message is being relayed via some non-SMTP mail transport that understands internet message headers and an error occurs in that non-SMTP environment.


In transit via SMTP messages SHOULD NOT contain a Return-Path header. The reverse path is carried in the SMTP envelope and delivery errors are reported using the SMTP envelope addresses.

--
Owen Rees; speaking personally, and not on behalf of HP.
========================================================
Hewlett-Packard Limited.   Registered No: 690597 England
Registered Office:  Cain Road, Bracknell, Berks RG12 1HN


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