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