Path: utzoo!utgpu!water!watmath!clyde!ima!cfisun!lakart!dg From: dg@lakart.UUCP (David Goodenough) Newsgroups: comp.mail.uucp Subject: Re: Rerouting considered GOOD Message-ID: <296@lakart.UUCP> Date: 18 Oct 88 00:39:29 GMT References: <1988Oct10.154932.4467@ateng.ateng.com> Organization: Lakart Corporation, Newton, MA Lines: 23 Chip Salzenberg sez: > Not to mention infinite loop detection. > > (Incidentally, active routers also have the potential for infinite loops.) > -- > Chip Salzenberg or > A T Engineering Me? Speak for my company? Surely you jest! > Beware of programmers carrying screwdrivers. Consider the following. Each message has a unique Message-ID (or is it Message-Id) field. As a solution to a programming problem where my mailer at home (pallio) kept sending out duplicate copies of letters (Always two, never three or one) I hung a 300 line front end on in front of rmail. Basically it does one of the Inews jobs: it maintains a record of all messages that have passed through lakart in the last 30 days. When it sees a message id for a second time it returns the letter to sender, and flags that it has done so (it is left as an exercise to the reader to figure out why it is flagged). -- dg@lakart.UUCP - David Goodenough +---+ | +-+-+ ....... !harvard!xait!lakart!dg +-+-+ | AKA: dg%lakart.uucp@harvard.harvard.edu +---+