ietf-smtp
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Re: Early history and 2821 (was: draft-duan-smtp-receiver-driven-00.txt)

2005-05-13 08:46:56

Also, the Return-Path is typically removed once the gate sees its a normal
message (no bounce requiired) before final storage for the end-user.   It is
not required any more at that point.

it is a violation of the standards for mail processors to remove Return-Path.
Return-Path is required even after delivery for proper processing of
message disposition notification requests and for generation of automatic
responses.