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- Xref: sparky comp.mail.headers:401 comp.mail.misc:4187
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- Path: sparky!uunet!seas.smu.edu!utacfd.uta.edu!rwsys!sneaky!gordon
- From: gordon@sneaky.lonestar.org (Gordon Burditt)
- Subject: Re: Return-Receipt-To & forwarding...
- Message-ID: <C04ywz.I4y@sneaky.lonestar.org>
- Organization: Gordon Burditt
- References: <19921225.001@erik.naggum.no> <sdorner-271292095054@0.0.0.0> <BzzGC8.4Gr@chinet.chi.il.us>
- Date: Thu, 31 Dec 1992 18:19:41 GMT
- Lines: 40
-
- >The AT&T packages that are more or less "on-line" and able to send at any
- >time generate the receipt when the message is displayed on the screen
- >(that is, the user selects "read"). The dial-up versions (access-plus
- >and the windows and mac equivalents) generate the receipts as the messages
- >are transferred out to the remote machine since they will be off-line
- >as they are read. The wording of the receipt is different to indicate
- >the condition.
-
- A friend of mine once wrote a popular (well, at least in the local
- UUCP net of our employer) mail user agent which attempted to implement
- read-mail-receipts, using Return-Receipt-To:.
-
- Various refinements occurred. One social problem which happened
- rapidly was the use of the mailer to send mail from A to B and C with
- return receipts to D, E, F, G, and H, the return receipts being an
- intentional form of harassment. It initially wasn't obvious to the
- victims that A was the one doing the harassing. A bug that got fixed
- pretty fast was that the "Return-Receipt-To:" header somehow wound up
- in the receipts, causing infinite receipt loops. Various refinements
- were needed to the algorithm needed to determine "read", and eventually
- the receipts started saying "read your message", "saved your message
- to a file", "deleted your message without reading it", etc. Some
- people considered this an invasion of privacy (although many of
- them didn't mind the original design). Some of them discovered
- how to provoke the mailer into issuing more than one receipt for
- the same piece of mail, and did so, frequently. Someone who went
- on vacation for a week was likely to end up with a megabyte of
- receipts in his mailbox, even if he never sent a piece of mail
- asking for a receipt. The use of "more /usr/spool/mail/$USER" as
- a mail reader increased greatly.
-
- A big problem showed up when I used the mailer to examine a very large
- file of archived mail, and it started sending receipts to all of
- the hundreds of year-old-and-older messages.
-
- Please try to design return receipts in a way that can't be used as
- a weapon.
-
- Gordon L. Burditt
- sneaky.lonestar.org!gordon
-