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Path: utzoo!linus!philabs!seismo!harpo!eagle!mhuxl!ihnp4!inuxc!pur-ee!uiucdcs!uiuccsb!essick
From: essick@uiuccsb.UUCP
Newsgroups: net.bugs.4bsd
Subject: Re: sendmail can lose forwarded mail - (nf)
Message-ID: <4532@uiucdcs.UUCP>
Date: Thu, 15-Dec-83 22:30:26 EST
Article-I.D.: uiucdcs.4532
Posted: Thu Dec 15 22:30:26 1983
Date-Received: Sat, 17-Dec-83 08:12:00 EST
Lines: 20

#R:vax4:-125600:uiuccsb:6300005:000:752
uiuccsb!essick    Dec 15 15:49:00 1983

	This sounds like the effects of a "don't get into an infinite 
forwarding loop" clause in sendmail.

	Since I haven't looked any farther than the 4.1C documentation
for sendmail, I can't offer any prepackaged solutions. This behavior
solves the "I'm gone; call me in two weeks" auto-mail-answering
problem. 

	This problem might be corrected by changing the way
infinite loops are detected from the outgoing edge where we can
say "is this going somewhere it has been" to the incoming
edge where we can say "have we seen this before and does it
have the same destination as the last time we saw it".
Note that this solution breaks down in the "I'm gone; call me" case
since the bouncing letters are new messages.

-- Ray Essick, University of Illinois