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- Xref: sparky comp.mail.headers:405 comp.mail.misc:4192
- Path: sparky!uunet!spool.mu.edu!umn.edu!gaia.ucs.orst.edu!skyking!stanley
- From: stanley@skyking.OCE.ORST.EDU (John Stanley)
- Newsgroups: comp.mail.headers,comp.mail.misc
- Subject: Re: Return-Receipt-To & forwarding...
- Date: 1 Jan 1993 19:06:55 GMT
- Organization: Oregon State University, College of Oceanography
- Lines: 46
- Message-ID: <1i24ofINNaul@gaia.ucs.orst.edu>
- NNTP-Posting-Host: skyking.oce.orst.edu
-
- In article <davecb.725910818@yorku.ca> davecb@nexus.yorku.ca (David Collier-Brown) writes:
- >stanley@skyking.OCE.ORST.EDU (John Stanley) writes:
- >|you didn't get a "599 ..." response. You don't even know that such a
- >|response wasn't sent, only that you didn't get one. You certainly don't
- >|know that the mail you sent was delivered.
- >
- >Short answer:
- > Go read RFC821/2 (and consider yourself insulted).
-
- You had better expand on that answer, for neither RFC appears to claim
- anything opposite to what I wrote. And, since both RFC's deal only with
- Internet standards, and since electronic mail can cross network
- boundaries to systems which have no requirement to use SMTP (much less
- obey Internet RFC's), neither can speak definitively on what I wrote.
-
- >Long answer:
- > Mail is a reliable, end-to-end service, and must
-
- Thanks for the laugh. You may think that mail is reliable, but that
- don't make it so. RFC 822 makes no mention of "reliable", and RFC 821
- mentions it in two instances, one of which specifies the use of a
- "reliable transport" mechanism.
-
- The other says that the objective of the SMTP standard is reliability.
- If you believe that this statement of objective is identical to a
- description of the current implementations, then consider yourself
- insulted.
-
- > actively acknowlege both receipt and errors.
-
- Even were this statement true, it does not prove that mail will always
- arrive at the intended recipient nor that error replies will arrive at
- the originator.
-
- > Gateways which do not support the above are possible
- > (the PC-critters are good at that),
-
- So are the UNIX critters, and the IBM critters, and every other
- critter. I know of no system, PC or otherwise, which actively acks
- receipt, unless the originator has requested it. That doesn't mean they
- don't exist, just that they aren't real common.
-
- > but no-one claims they're standard-conforming.
-
- This, of course, begs the question, whose standard?
-
-