Is Hotmail in the habit of ignoring MX records?

Fri Jul 27 02:28:47 UTC 2012

On Jul 26, 2012, at 6:34 PM, Mark Andrews wrote:

> In message <A9A5C64B-831D-42BF-8A38-56CC3B9BAF48 at kapu.net>, Michael J Wise writ
> es:
>> 
>> On Jul 26, 2012, at 1:35 AM, Lou Katz wrote:
>> 
>>> The domain is cookephoto.com
>> 
>> Why does mail.metron.com have MX records?
> 
> Why do you care?  There is nothing wrong with having explict MX
> records and they generally take up less room in a DNS cache then
> the negative response does especially if it is DNSSEC signed.
> 
>> And they're different.
> 
> Again why do you care?

Why do *I* care?
I don't.

I'm just trying to find the weird bit that maybe is causing hotmail to stumble.
And maybe an endless loop for an MX lookup might be what is causing hotmail to panic and throw out the MX records.

>> 	$ host cookephoto.com
>> 	cookephoto.com has address 192.160.193.89
>> 	cookephoto.com mail is handled by 10 mail.metron.com.
>> 	cookephoto.com mail is handled by 12 mail2.metron.com.
>> 	cookephoto.com mail is handled by 15 mail.katz.com.
>> 
>> 	$ host mail.metron.com
>> 	mail.metron.com has address 192.160.193.14
>> 	mail.metron.com mail is handled by 10 mail.metron.com.
>> 	mail.metron.com mail is handled by 20 mail.katz.com.
>> 
>> 	$ host mail.katz.com
>> 	mail.katz.com has address 192.160.193.14
>> 
>> 	$ host mail2.metron.com
>> 	mail2.metron.com has address 209.204.189.91
>> 
>> 	$ host plaid.metron.com
>> 	plaid.metron.com has address 192.160.193.135
>> 
>> Normally, in my experience, the actual mail server doesn't have MX 
>> records as such, but=85.
>> Just seems 0dd.
> 
> All address record (A and AAAAA) have MX records.  Some may be
> implicit but as far as SMTP is concerned they all have MX records.
> 
>> Also, you say =85
>> 
>>> At the time of the transaction, nothing special was happening here, 
>> ...
>> 
>> Was anything strange happening with any of the DNS records for any of 
>> these domains in the past two days?
>> 
>> Aloha,
>> Michael.
>> -- 
>> "Please have your Internet License             
>> and Usenet Registration handy..."
> -- 
> Mark Andrews, ISC
> 1 Seymour St., Dundas Valley, NSW 2117, Australia
> PHONE: +61 2 9871 4742                 INTERNET: marka at isc.org

Aloha,
Michael.
-- 
"Please have your Internet License             
 and Usenet Registration handy..."