>> If you wish to do address detection, put it in a user-defined header.
>
> Can't the savvy user just look through the 'Received' headers to find
> the lines that contain the "for" value. That's where I would look for
> the address the delivery was to.
That only works if there is a single recipient on the destination machine.
When a single mail message is sent to user1@host.com and user2@host.com, the
'Received' headers will NOT have a 'for' line. This is true even when one of
the users is included as part of a Bcc list,
This misfeature makes it difficult for a POP client to reliably reroute
messages that got dumped into a single mailbox.
-Joe
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