>> 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 @
com and user2 @
'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.