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Path: utzoo!utgpu!water!watnot!watmath!clyde!cbatt!ihnp4!alberta!ubc-vision!van-bc!sl
From: sl@van-bc.UUCP
Newsgroups: comp.unix.questions
Subject: Re: withdrawing mails
Message-ID: <354@van-bc.UUCP>
Date: Wed, 4-Mar-87 03:58:26 EST
Article-I.D.: van-bc.354
Posted: Wed Mar  4 03:58:26 1987
Date-Received: Fri, 6-Mar-87 06:28:57 EST
References: <3126@osu-eddie.UUCP> <716@mit-amt.MEDIA.MIT.EDU> <3144@osu-eddie.UUCP> <2420@mtgzy.UUCP>
Reply-To: sl@van-bc.UUCP (Stuart Lynne)
Organization: Public Access Network, Vancouver, BC.
Lines: 43

In article <2420@mtgzy.UUCP> ecl@mtgzy.UUCP writes:
>In article <3144@osu-eddie.UUCP>, lien@osu-eddie.UUCP writes:
>> This is the point that US mail beat E-mail:
>> 
>> One can alway withdraw a mail from one's own mailbox before
>> mailman comes. This is usually one  night and one  morning
>> ( may be one long weekend ).
>
>True, but this is analagous to composing a file to send and then setting up
>an 'at' or a 'cron' job to mail it.  Once you drop a letter in a post office
>drop box (like on a street corner) you *can't* get it back without all sorts of
>legal hassle, etc.
>
>					Evelyn C. Leeper
>					(201) 957-2070
>				UUCP:	ihnp4!mtgzy!ecl
>				ARPA:	mtgzy!ecl@rutgers.rutgers.edu


In point of fact the CCITT X.400 has almost precisely this capability. If
you send a deferred delivery message you can attempt to cancel it.

	X.400 4.1.2.8 Defferred delivery cancellation
		This service element aenables an originating UA to instruct the MTS
	to cancel a previously successfully submitted deferred delivery message.
	The canellation attmpt may not always succeed. Possible reasons for 
	failure are: deferred delivery time has passed, or the message has
	already been forwarded within the MTS.

		(UA - User Agent, MTS - Message Transfer System)

There is no equivalent capability for messages submitted for immediate
delivery.





-- 
Stuart Lynne	ihnp4!alberta!ubc-vision!van-bc!sl     Vancouver,BC,604-937-7532
Todays selection: Perry Mason solves The Case of the Careless Kitten, Erle
Stanley Gardner, 1942. The ingredients for murder were: A poisoned kitten; a
misssing uncle; a slow-speaking gardener; a prospective bridegrooms accident!