>DSN:  Delivery Status Notification, i.e. "Return-Receipt-To:".

dsn usurps (and will ultimately replace) the return-receipt-to thing.

>I typically use it for debugging in an unfamiliar environment to make
>sure the mail goes where I send it.

i use it to try to keep track of what mail i've sent on a given day.
mailing lists and non-returning systems don't help me very much
though.

>Another method of DSN is used by Microshaft Exchange (god help me) which
>interacts with the Outlook mailer, and that is a *read* receipt, i.e.
>"tell me when $USER *reads* this message."  I've sadly had to resort
>to it with my boss so he can't say "I didn't see your e-mail."  Again,
>not for common use (there are many privacy advocates who strongly
>oppose read receipts, though some of them don't object too strenuously
>to return-receipt-to (i.e. delivery notification)).

isn't that the one that goes:

   Note: this Return Receipt only acknowledges that the message was
   displayed on the recipient's machine. There is no guarantee that the
   content has been read or understood.

sounds very legalese to me.  silly stuff...

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