thanks, sebastian! As it turns out it is/was a hotmail problem

On 3/19/2013 10:15 AM, Sebastian Grewe wrote:
> Hotmail was having issues with their server farm. Many servers died due to 
> high temperatures. Maybe it's related?
>
> http://www.pcworld.com/article/2030836/microsoft-blames-outlook-hotmail-outage-on-overheated-servers-apologizes.html
>
> Also some things I thought about
>
> * can your look up and resolve some of their MXers?
> ** dig mx hotmail.com
> * did your host make it on a blocklist?
> ** http://mxtoolbox.com/blacklists.aspx
>
> On Tue, 19 Mar 2013 10:04:41 -0600
> Eric Broch <[email protected]> wrote:
>
>> On 3/19/2013 9:49 AM, cj yother wrote:
>>> On 03/19/2013 05:08 AM, Eric Broch wrote:
>>>> Hello list,
>>>>
>>>> I have a user trying to send mail to a Hotmail account. The following
>>>> error continues to reoccur:
>>>>
>>>> Server error: '451 DNS temporary failure (#4.5.1 - chkuser)'
>>>>
>>>> I looked over qmail archives and found scant info on the subject. Is
>>>> this a problem with hotmail?
>>>>
>>>> Eric
>>>>
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>>> That's most likely on your end.  Does your server resolve hotmail.com
>>> correctly?  I also have heard that hotmail is being phased out and
>>> maybe they are in the process of making the changes.
>>>
>> CJ, Yes it resolves correctly.
>>
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