Xref: utzoo comp.mail.uucp:1564 comp.mail.headers:368 Path: utzoo!attcan!uunet!lll-winken!lll-tis!ames!pasteur!ucbvax!decwrl!palo-alto!vixie From: vixie@palo-alto.DEC.COM (Paul Vixie) Newsgroups: comp.mail.uucp,comp.mail.headers Subject: Real data to support my claim that '-d sun' is the way to go. Message-ID: <3703@palo-alto.DEC.COM> Date: 6 Aug 88 06:13:40 GMT Organization: DEC Western Research Lab Lines: 105 [ By the way, I'm sure Sun is grateful for my decision. They pass an awful lot of mail for free there, and they don't need my traffic at all. ] I ran a test tonight to see how Sun.COM's MTA was behaving. The results are unsurprising. I sent three messages from my home machine, vixie.UUCP, to myself on decwrl.dec.com. I used this path in all three: pacbell!sun!decwrl!vixie. I edited the messages in the UUCP spool directory before they were sent to pacbell, so I could try several different "From:" lines. The original text of the "From:" line is duplicated in the "Subject:" line -- luckily, Sun.COM does _not_ rewrite "Subject:" lines -- yet :-). Note that in all three cases, the "Return-Path:" header has the correct contents. (For those not in the know, Return-Path: is where MH puts the UUCP From_ line.) A value of "sun!pacbell!vixie!paul" is correct because this is in fact an exact reverse of the route the message took to get here. Note also that the "To:" line is in its original form, which is correct. Many MTAs incorrectly strip their own name out of the To: header; one can probably assume that if "sun!" had been on the front of the "To:" value, it would have been stripped. Since it was hiding behind a "pacbell!", it was safe. :::::::::::::: inbox/140 :::::::::::::: Return-Path: sun!pacbell!vixie!paul Received: from SUN.COM by decwrl.dec.com (5.54.5/4.7.34) id AA17907; Fri, 5 Aug 88 20:33:51 PDT Received: from sun.Sun.COM by Sun.COM (4.0/SMI-4.0) id AA11577; Fri, 5 Aug 88 20:31:54 PDT Received: from pacbell.UUCP by sun.Sun.COM (4.0/SMI-4.0) id AA07135; Fri, 5 Aug 88 20:35:22 PDT Received: by vixie.UUCP (5.51++/smail2.3/02-18-87) id AA12696; Fri, 5 Aug 88 19:12:47 PDT Message-Id: <8808060212.AA12696@vixie.UUCP> To: pacbell!sun!decwrl!vixie Subject: test, From: line in @ notation (From: paul@vixie.uu.net) Date: Fri, 05 Aug 88 19:12:42 PDT From: Paul A Vixie --- This first one is replyable, though for a strange reason. decwrl would send it to "sun!" who would see "vixie.uu.net!" and say "ah, uunet.uu.net is the MX for *.uu.net, so I'll send it to uunet.uu.net who will deliver it further." The message didn't come through uunet to get to decwrl; why should it have to go back that way? If decwrl were running a passive router, the message would still have to go to "sun!" since passive routers (as I define the term) will only route to the first host/domain in a path. Perhaps hosts like Sun.COM are the reason why hosts like Rutgers.EDU exist? (Rutgers is an active rerouter, it will start on the right end of a path and route to the first thing it recognizes; this is evil and rude, as I explained yesterday). :::::::::::::: inbox/141 :::::::::::::: Return-Path: sun!pacbell!vixie!paul Received: from SUN.COM by decwrl.dec.com (5.54.5/4.7.34) id AA17905; Fri, 5 Aug 88 20:33:51 PDT Received: from sun.Sun.COM by Sun.COM (4.0/SMI-4.0) id AA11571; Fri, 5 Aug 88 20:31:48 PDT Received: from pacbell.UUCP by sun.Sun.COM (4.0/SMI-4.0) id AA07126; Fri, 5 Aug 88 20:35:15 PDT Received: by vixie.UUCP (5.51++/smail2.3/02-18-87) id AA12667; Fri, 5 Aug 88 19:09:42 PDT Message-Id: <8808060209.AA12667@vixie.UUCP> To: pacbell!sun!decwrl!vixie Subject: test, From: line in @ notation (From: paul@vixie.UUCP) Date: Fri, 05 Aug 88 19:09:37 PDT From: Paul A Vixie --- This message is unreplyable. This is why I have "-d sun" in my makepaths script. I can't fault Sun.COM for rewriting u@h.UUCP to h!u since they mean the same thing; adding "sun!" to the front of the result is just plain wrong and there is no modern defense for the practice. :::::::::::::: inbox/142 :::::::::::::: Return-Path: sun!pacbell!vixie!paul Received: from SUN.COM by decwrl.dec.com (5.54.5/4.7.34) id AA17906; Fri, 5 Aug 88 20:33:51 PDT Received: from sun.Sun.COM by Sun.COM (4.0/SMI-4.0) id AA11574; Fri, 5 Aug 88 20:31:52 PDT Received: from pacbell.UUCP by sun.Sun.COM (4.0/SMI-4.0) id AA07131; Fri, 5 Aug 88 20:35:19 PDT Received: by vixie.UUCP (5.51++/smail2.3/02-18-87) id AA12677; Fri, 5 Aug 88 19:10:23 PDT Message-Id: <8808060210.AA12677@vixie.UUCP> To: pacbell!sun!decwrl!vixie Subject: test, From: line in ! notation (From: vixie!paul) Date: Fri, 05 Aug 88 19:10:20 PDT From: Paul A Vixie --- See comments from #141. -- Paul Vixie Digital Equipment Corporation Work: vixie@dec.com Play: paul@vixie.UUCP Western Research Laboratory uunet!decwrl!vixie uunet!vixie!paul Palo Alto, California, USA +1 415 853 6600 +1 415 864 7013