hotmail.com live.com admin needed

Michiel Klaver michiel at klaver.it
Wed Oct 24 07:00:53 UTC 2012


As mentioned before, check the mail-logs at your webserver, you'll find this
"authentication required" message logged there as response to the hotmail
servers trying to relay mail to that webserver.


At 23-10-2012 14:49, Suresh Ramasubramanian wrote:
> "authentication required" is a bizzarre error to return.
> 
> Does it go away if you actually turn off graylisting for hotmail?
> 
> On Tuesday, October 23, 2012, Carlos M. Perez wrote:
> 
>> Mike,
>>
>> I think this is exactly what is going on.  The domains that are having
>> issues have greylisting on with the spam filtering service and are
>> hosted on a farm of hosting servers.  We have blocked port 25 on the
>> main hosting IP of the web server, and moved the built in mail server to
>> listen on another IP.  This appears to be working, or at least has been
>> for almost 12 hours.
>>
>> The real question is why is hotmail/live the only system that apparently
>> does this; which seems to be in contradiction to RFC, and how everyone
>> else does it.  The one thing that MS chooses to be different with...
>>
>> Thanks,
>>
>> Carlos M. Perez
>> Runcentral, LLC
>>
>> On 10/23/2012 4:28 AM, Michiel Klaver wrote:
>>> Carlos,
>>>
>>> check the mail logs of your web-server, your domain might have a primary
>>> A-record pointing to something different than MX-records. When the MX
>>> servers do something like greylisting and bounce with a temp-code (4xx)
>>> hotmail servers will try alternative records (like @ IN A) and might
>> find a
>>> listening mail-daemon at your webserver.
>>>
>>>
>>> At 23-10-2012 00:16, Carlos M. Perez wrote:
>>>> Hi,
>>>>
>>>> We're trying to resolve some delivery issues reported by hotmail users.
>>>> Started happening a few weeks ago.  Getting immediate NDRs, and the
>>>> server that is supposed to receive the email has no records of
>>>> attempts.  The messages also don't match what the receiving server
>>>> should be sending.  The server(s) listed in the MX should receive all
>>>> email without authentication, since it's a mail filtering service
>> (Maxmail)
>>>>
>>>> =
>>>> Reporting-MTA: dns;snt0-omc3-s27.snt0.hotmail.com
>>>> Received-From-MTA: dns;SNT133-W53
>>>> Arrival-Date: Mon, 22 Oct 2012 14:09:49 -0700
>>>>
>>>> Final-Recipient: rfc822;administrator at xxxx.com <javascript:;>
>>>> Action: failed
>>>> Status: 5.5.0
>>>> Diagnostic-Code: smtp;550 authentication required
>>>> =
>>>>
>>>> Kindly contact me off-list.
>>>>
>>>> Thanks,
>>>>
>>>
>>>
>>>
>>
>>
>>
>>
>>
>>
>>
>>
> 



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