outlook.com outgoing blacklists?

Thu Sep 10 14:37:22 UTC 2015

Interesting, however those ipv6 addresses were dropped from our dns almost 2 
weeks ago.
No quad A records should exist anylonger, as it has been more than 48 hours.

-----Original Message----- 
From: Tony Finch
Sent: Thursday, September 10, 2015 9:24 AM
To: Todd K Grand
Cc: Steve Atkins ; nanog list
Subject: Re: outlook.com outgoing blacklists?

Todd K Grand <tgrand at tgrand.com> wrote:

> Content-Type: message/delivery-status
>
> Reporting-MTA: dns;COL004-OMC2S2.hotmail.com
> Received-From-MTA: dns;COL129-W41
> Arrival-Date: Wed, 9 Sep 2015 02:13:28 -0700
>
> Final-Recipient: rfc822;support at qkstream.com
> Action: failed
> Status: 5.5.0
> Diagnostic-Code: smtp;554 The mail could not be delivered to the recipient 
> because the domain is not reachable. Please check the domain and try again 
> (-744508417:308:-2147467259)

Looks like there are some IPv6 and TCP problems with the DNS

http://dnsviz.net/d/qkstream.com/dnssec/

Tony.
-- 
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