learning about DNS loop :-)
It is somewhat ironic that a mail about a.o. a book on DNS and Bind cannot be delivered because of a malconfigured MX record :-) Erik ------- Forwarded Message Date: Wed, 11 Nov 92 10:59:00 +0200 From: PMDF Mail Server <postmaster@vxdesy.desy.de> To: postmaster@vxdesy.desy.de, Erik.Huizer@SURFnet.nl Subject: Undeliverable mail: SMTP delivery failure The message could not be delivered to: Addressee: f58fre@dsyibm.desy.de Reason: Cannot accept mail for this host; MX records will cause loop. - ---------------------------------------- Received: from DIRECTORY-DAEMON by vax58b.desy.de (PMDF #12416) id <01GR0U6ZYXDCA9LA87@vax58b.desy.de>; Wed, 11 Nov 1992 10:59 +0200 Received: from ncc.ripe.net by vax58b.desy.de (PMDF #12416) id <01GR0U6JUM5SA9LA85@vax58b.desy.de>; Wed, 11 Nov 1992 10:58 +0200 Received: from survis.surfnet.nl by ncc.ripe.net with SMTP id AA11332 (5.65a/NCC-3.0); Wed, 11 Nov 1992 10:46:39 +0100 Received: from surfnet.nl by survis.surfnet.nl with SMTP (PP) id <16013-0@survis.surfnet.nl>; Wed, 11 Nov 1992 10:46:36 +0100 Received: from localhost by survival.surfnet.nl (4.1/SMI-4.1(TV920629)) id AA05415; Wed, 11 Nov 92 10:46:34 +0100 Date: Wed, 11 Nov 92 10:46:33 +0100 From: Erik Huizer <Erik.Huizer@SURFnet.nl> Subject: FYI: Book info To: wg-usis@rare.nl Cc: ripe@ripe.net Message-id: <9211110946.AA05415@survival.surfnet.nl> Organisation: SURFnet bv Address: Cluetinckborch, P.O. Box 19035, 3501 DA Utrecht, NL Phone: +31 30 310290 Telefax: +31 30 340903 Several people asked me for the info on the books I showed in Pisa. Here it is: The Internet System Handbook, editors D. Lynch and M. Rose, Addison Wesley, ISBN 0-201-56741-5 The Internet Message, Marshall T. Rose, Prentice Hall, ISBN 0-13-092941-7 Exploring the Internet (the travel book), Carl Malamud, Prentice Hall, ISBN 0-13-296898-3 DNS and BIND, P. Albitz and C. Liu, O`Reilly & ass., ISBN 1-56592-010-4 Erik ------- End of Forwarded Message
It is somewhat ironic that a mail about a.o. a book on DNS and Bind cannot be delivered because of a malconfigured MX record :-) :-) :-) ------- Forwarded Message Date: Wed, 11 Nov 92 10:59:00 +0200 From: PMDF Mail Server <postmaster@vxdesy.desy.de> To: postmaster@vxdesy.desy.de, Erik.Huizer@SURFnet.nl Subject: Undeliverable mail: SMTP delivery failure The message could not be delivered to: Addressee: f58fre@dsyibm.desy.de Reason: Cannot accept mail for this host; MX records will cause loop. ---------------------------------------- Looking at the MX records though: ; <<>> DiG 2.0 <<>> dsyibm.desy.de. mx ;; ->>HEADER<<- opcode: QUERY , status: NOERROR, id: 6 ;; flags: qr rd ra ; Ques: 1, Ans: 1, Auth: 4, Addit: 5 ;; QUESTIONS: ;; dsyibm.desy.de, type = MX, class = IN ;; ANSWERS: dsyibm.desy.de. 172716 MX 20 dsyibm.desy.de. there is no reason at all for such a loop. So it looks more like a misconfigured mailer than a misconfigured DNS to me... Piet
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