On Wed, 2002-10-09 at 22:30, Jeffrey Stedfast wrote:
> Envelope-To: is not a standard header as far as I'm aware. Plus none of
> my messages seem to even have it.
Envelope-To: is added by a couple of MTAs (specifically exim, I think at
least one other does, and in exim it is configurable in the transport
definition), at delivery time. It is basically an exact analog of
Return-Path but for the recipient address rather than the sender.
The reliability of Envelope-To: depends on your mail system configs -
for example I rewrite all addresses when they hit our edge mail system,
and the system they are delivered onto sees them all as
nigel+something@internal-mailsystem (where something is derived from the
original recipient address) - and this is what is in the Envelope-To:
header added on final delivery. Obviously if you do nasty things to
your mail like this then Envelope-To: is not directly usable ...
Nigel.
--
[ Nigel Metheringham [EMAIL PROTECTED] ]
[ - Comments in this message are my own and not ITO opinion/policy - ]
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