Hi, to be able to automatically send a reply to delivery confirmation
request messages, the program needs to reliably sort out confirmation
request messages from other delivery notifications (bounces).  It also
needs to make sure that the confirmation request message is not forged.

To make this possible, I suggest that confirmation request messages are
created with a special Message-ID.  The Message-ID of the request
message is created from the Message-ID of the message that causes the
confirmation request, by prepending ``confirm-'', and appending the
local host part[0].

The latest qconfirm version does this, and it would be nice if tmda and
ask could do this also.  Presuming that confirmation request messages
are sent to the envelope sender (should be self-evident), qconfirm then
would be able to auto-confirm delivery of messages to tmda and ask
users.  See the documentation[1] for details if you are interested in
how qconfirm does this.

Thanks for considering, Gerrit.

[0] http://smarden.org/qconfirm/technical.html#request
[1] http://smarden.org/qconfirm/technical.html#outgoing
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