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- Xref: sparky comp.mail.headers:411 comp.mail.misc:4203
- Newsgroups: comp.mail.headers,comp.mail.misc
- Path: sparky!uunet!psinntp!monymsys!sonyd1.Broadcast.Sony.COM!blilly.UUCP!bruce
- From: bruce@blilly.UUCP (Bruce Lilly)
- Subject: Re: Return and read receipts (was Re: Return-Receipt-To & forwarding...)
- References: <1992Dec29.181814.4105@chance.gts.org> <1992Dec31.003223.22169@blilly.UUCP> <davecb.725911218@yorku.ca>
- Organization: Bruce Lilly
- Date: Sat, 2 Jan 93 04:29:41 GMT
- Message-ID: <1993Jan2.042941.2066@blilly.UUCP>
- Reply-To: lilb@sony.compuserve.com (Bruce Lilly)
- Lines: 38
-
- In article <davecb.725911218@yorku.ca>,
- posted to comp.mail.headers,comp.mail.misc,
- davecb@nexus.yorku.ca (David Collier-Brown) wrote:
- >
- > This assumes store-and forward, something which is getting
- >less and less poplular at time passes, and was never part of
- >the RFC world anyway.
-
- Assuming that for each message sent, one does not
- a) directly open an SMTP connection to the recipient's host
- (assuming such a connection even exists)
- and
- b) the SMTP command SEND or SAML (not SOML or MAIL) is used,
- and that on failed delivery the entire message is rekeyed manually
- by the originator
- then mail is inherently store-and-forward to some extent. RFC822 and
- RFC1123 both provide mechanisms for routing of mail, which usually is
- implemented as store-and-forward. And let's not forget RFC976, which
- specifically applies to UUCP mail (inherently store-and-forward).
-
- As the use of computers and computer-based mail grows within an
- organization, it is often the case that mail gateways are set up to offload
- mail transport handling tasks from individual workstations. Often the mail
- gateways will store mail, later forwarding it to a workstation, or to another
- machine. I submit, therefore, that store-and-forward may actually become
- more widely used, not less so, within the Internet.
-
- As network topologies and sizes change, it is sometimes enlightening to review
- one's assumptions. To take another mail-related example, it used to be the
- case that a moderate number of "hops" (say two dozen) could be considered to
- be an indication of a mail loop. Today it is possible to easily reach
- several dozen hops (via gateway and firewall machines) even within a small
- organization. Result: hop count alone is probably no longer useful as an
- indication of a mail loop (if it ever was).
-
- --
- Bruce Lilly blilly!bruce@Broadcast.Sony.COM
- ...uunet!sonyusa!sonyd1!blilly!bruce
-