michael@mistress:~$ host 65.55.90.110
110.90.55.65.in-addr.arpa domain name pointer snt004-omc2s35.hotmail.com.
michael@mistress:~$ host 65.55.90.110 8.8.8.8
Using domain server:
Name: 8.8.8.8
Address: 8.8.8.8#53
Aliases:

Host 110.90.55.65.in-addr.arpa not found: 2(SERVFAIL)


On 16-03-07 02:14 PM, Michael Wise wrote:
Hotmail doesn't publish any DNSSEC records.

Neither does Microsoft.com, etc....

As for the rDNS, this is from my home server:

$ host 65.55.169.87

87.169.55.65.in-addr.arpa domain name pointer
mail-bl2on0087.outbound.protection.outlook.com.

Aloha,

Michael.

--

Michael J Wise | Microsoft | Spam Analysis | "Your Spam Specimen Has
Been Processed." | Got the Junk Mail Reporting Tool ?

-----Original Message-----
From: mailop [mailto:mailop-boun...@mailop.org] On Behalf Of Tony Bunce
Sent: Monday, March 7, 2016 1:56 PM
To: Michael Peddemors <mich...@linuxmagic.com>; mailop <mailop@mailop.org>
Subject: Re: [mailop] Google DNS Servers not returning results for
Hotmail today?

We are seeing similar issues on Office 365 mail.

We are getting SERVFAIL on reverse DNS lookups, both using our resolvers
as well as testing against Google.

It looks DNSSEC related:

https://na01.safelinks.protection.outlook.com/?url=87.169.55.65.in-addr.arpa&data=01%7c01%7cmichael.wise%40microsoft.com%7c44129af38f454438da6b08d346d43c41%7c72f988bf86f141af91ab2d7cd011db47%7c1&sdata=orZOsyfUwl8QutwjS33FHJ1lGr%2fkG2mP9D7cPpXW2F8%3d
PTR: bad cache hit
(https://na01.safelinks.protection.outlook.com/?url=55.65.in-addr.arpa%2fDS&data=01%7c01%7cmichael.wise%40microsoft.com%7c44129af38f454438da6b08d346d43c41%7c72f988bf86f141af91ab2d7cd011db47%7c1&sdata=zLpvVVaYnzIbpAu%2fJHl6qPl0e%2fGhRiOBqfY9J1waEoY%3d)

With checks disabled the query works:

dig -x 65.55.169.63 +cd

This looks like something is not right:

https://na01.safelinks.protection.outlook.com/?url=http%3a%2f%2fdnsviz.net%2fd%2f55.65.in-addr.arpa%2fdnssec%2f&data=01%7c01%7cmichael.wise%40microsoft.com%7c44129af38f454438da6b08d346d43c41%7c72f988bf86f141af91ab2d7cd011db47%7c1&sdata=d3aCKTnyI0a1w6CjpyIfs2S1o49kxgBa1cULgt5ViAM%3d

-Tony

-----Original Message-----

From: mailop [mailto:mailop-boun...@mailop.org] On Behalf Of Michael
Peddemors

Sent: Monday, March 7, 2016 4:29 PM

To: mailop <mailop@mailop.org <mailto:mailop@mailop.org>>

Subject: [mailop] Google DNS Servers not returning results for Hotmail
today?

Had several reports of DNS oddities from the Google DNS servers, from

customers/clients who use them as the default.

Are they in the middle of a move/change?

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