You have a point there David, but the Organisation of Internet Providers
in Austria should probably look into that issue and lead with a good
example.
So in this instance I think it is fair to try to get them to fix it. 

On 2017-08-11 13:26, David Hofstee wrote:

> You are right. But there exist so many domain setups that are borken (IPv6 
> issues, backup MX that won't accept email, disk that are full, ...). Because 
> email is complex for most. What was the reason you posted it here? 
> 
> You could 'reroute' the email to an IPv4 sending IP when pattern X is 
> replied. I'm sure it won't be the last domain where this is seen. 
> 
> Yours, 
> 
> David 
> 
> On 11 August 2017 at 11:53, Wolfgang Breyha <wbre...@gmx.net> wrote:
> 
>> Hi!
>> 
>> I tried to send E-Mail to the Domain ispa.at [1] which is part of the 
>> office365
>> cloud, which obviously has a broken setup:
>> 
>> Reporting-MTA: dns; grace.univie.ac.at [2]
>> 
>> Action: failed
>> Final-Recipient: rfc822;xxxxxxxxx...@ispa.at
>> Status: 5.0.0
>> Remote-MTA: dns; ispa-at.mail.protection.outlook.de [3]
>> Diagnostic-Code: smtp; 550 5.2.1 Service Unavailable, [ispa.at [1]] does not
>> accept email over IPv6 [FRAGER01FT003.eop-ger01.prod.protection.outlook.de 
>> [4]]
>> 
>> Either you announce a MX with AAAA RRs or you do not. Rejecting Mail this
>> way breaks E-Mail for ispa.at [1] badly.
>> 
>> $ host -t mx ispa.at [1]
>> ispa.at [1] mail is handled by 10 ispa-at.mail.protection.outlook.de [3].
>> $ host ispa-at.mail.protection.outlook.de [3].
>> ispa-at.mail.protection.outlook.de [3] has address 51.5.80.10
>> ispa-at.mail.protection.outlook.de [3] has address 51.4.80.10
>> ispa-at.mail.protection.outlook.de [3] has IPv6 address 
>> 2a01:4180:4050:800::10
>> ispa-at.mail.protection.outlook.de [3] 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 [5]
>> --
>> 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 [6]
> 
> -- 
> 
> -- 
> My opinion is mine. 
> _______________________________________________
> mailop mailing list
> mailop@mailop.org
> https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
 

Links:
------
[1] http://ispa.at
[2] http://grace.univie.ac.at
[3] http://ispa-at.mail.protection.outlook.de
[4] http://FRAGER01FT003.eop-ger01.prod.protection.outlook.de
[5] http://univie.ac.at
[6] https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
_______________________________________________
mailop mailing list
mailop@mailop.org
https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop

Reply via email to