Hi! I tried to send E-Mail to the Domain ispa.at which is part of the office365 cloud, which obviously has a broken setup:
Reporting-MTA: dns; grace.univie.ac.at Action: failed Final-Recipient: rfc822;xxxxxxxxx...@ispa.at Status: 5.0.0 Remote-MTA: dns; ispa-at.mail.protection.outlook.de Diagnostic-Code: smtp; 550 5.2.1 Service Unavailable, [ispa.at] does not accept email over IPv6 [FRAGER01FT003.eop-ger01.prod.protection.outlook.de] Either you announce a MX with AAAA RRs or you do not. Rejecting Mail this way breaks E-Mail for ispa.at badly. $ host -t mx ispa.at ispa.at mail is handled by 10 ispa-at.mail.protection.outlook.de. $ host ispa-at.mail.protection.outlook.de. ispa-at.mail.protection.outlook.de has address 51.5.80.10 ispa-at.mail.protection.outlook.de has address 51.4.80.10 ispa-at.mail.protection.outlook.de has IPv6 address 2a01:4180:4050:800::10 ispa-at.mail.protection.outlook.de has IPv6 address 2a01:4180:4051:800::10 I will report this to the owner of the Domain as well. With kind regards, Wolfgang Breyha postmaster at univie.ac.at -- Wolfgang Breyha <wbre...@gmx.net> | http://www.blafasel.at/ Vienna University Computer Center | Austria _______________________________________________ mailop mailing list mailop@mailop.org https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
