Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!pdn!tscs!tct!chip From: chip@tct.uucp (Chip Salzenberg) Newsgroups: comp.mail.misc Subject: Re: Which headers may Sendmail re-write? Message-ID: <27640C8A.1A46@tct.uucp> Date: 10 Dec 90 22:30:34 GMT References: <208@frcs.UUCP> <1990Dec5.150355.23457@mp.cs.niu.edu> Organization: Teltronics/TCT, Sarasota, FL Lines: 23 According to rickert@mp.cs.niu.edu (Neil Rickert): >A well designed 'sendmail.cf' will try to make sure that all addresses >are valid. If they are not valid, it will try to add routing to make sure >there is a valid internet address on the outgoing mail. If the incoming >address is already valid it is normally rewritten to its incoming form. This paragraph -- apparently written with a straight face -- brought to my mind this particularly appropriate quotation: This debate [over UUCP rerouting] is about whether any person can reliably know everything others know, want, and do. Some people believe the answer is yes. The rest of us are amazed. -- Vernon Schryver The Great Header Rewriting Debate breaks down along the same lines. No one can reliably know the form of all addresses that will be accepted as valid on another person's machine. If one neighbor site generates addresses that cannot be understood by another neighbor site, what business is that of yours? Correct answer: "None." -- Chip Salzenberg at Teltronics/TCT , "What's that thing, when people die, they take apart the body to see why?" -- St. Theresa of the Net