Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!mnetor!seismo!lll-crg!lll-lcc!styx!mcb
From: mcb@styx.UUCP (Michael C. Berch)
Newsgroups: net.mail.headers
Subject: Re: CONFIRM: DELIVERY
Message-ID: <20884@styx.UUCP>
Date: Wed, 24-Sep-86 17:23:29 EDT
Article-I.D.: styx.20884
Posted: Wed Sep 24 17:23:29 1986
Date-Received: Wed, 24-Sep-86 22:28:05 EDT
References: <4070@brl-smoke.ARPA>
Reply-To: mcb@styx.UUCP (Michael C. Berch)
Distribution: net
Organization: Lawrence Livermore Laboratory, Livermore CA
Lines: 24

Jacob_Palme_QZ%QZCOM.MAILNET@MIT-MULTICS.ARPA writes:
> I am considering implementing in COM a facility that if an incoming
> message has "CONFIRM: DELIVERY" in the RFC822 header, then
> when the message has been delivered to the recipient mailbox,
> a message is sent back to the SMTP-sender saying that this
> has been done.
> . . .
> Any comments? Has anyone already implemented something similar?
> In that case, I should use their syntax and not reinvent something
> different.

A large percentage of Internet mailers (and at least one user agent) 
respond to the header field

	Return-Receipt-To: <addr-spec>

confirming delivery of a message to a mailbox (in the case of a
delivery agent) or reading of the message (in the case of a user
agent). It isn't in RFC822, but I'd call it a de facto standard among
822-style mailers.

Michael C. Berch
ARPA: mcb@lll-tis-b.ARPA
UUCP: {ihnp4,dual,sun}!lll-lcc!styx!mcb