Could not send email to office 365

Jason Sherron jason.sherron at microsoft.com
Tue May 14 18:02:49 UTC 2013


I'm an engineer on the Microsoft Office365 Exchange Online ("outlook.office365.com") network team. I'm gathering forensics specific to IPv6 reports -- are people still experiencing IPv6-related issues? I am interested solely in failures that are IPv6 connection issues to "outlook.office365.com". 

If you have a clear repro of an IPv6 connection failure, please message me off-list with at least a traceroute. (Please don't deluge me with non-IPv6-related issues -- I'm a network guy working on this one report.)

Jason (dot) Sherron [at] Microsoft (dot) com



-----Original Message-----
From: JoeSox [mailto:joesox at gmail.com] 
Sent: Wednesday, May 8, 2013 4:35 PM
To: nanog at nanog.org
Subject: Re: Could not send email to office 365

Just an update if list members are still experiencing this issue. I spoke on the phone with Escalation Manager for Microsoft North America and they had meetings today and their Engineering team is putting a game plan together to roll out a fix for the Outlook connectivity issues.  They were debating to roll-out to the group of effected customers or one-by-one. From the data I provided to them it looks like something to do with their NSPI RPC endpoint environment. They told me I should receive a call tomorrow but call them Friday if I do not receive a call. Hopefully, everyone else experiencing this issue is being taken care of as this is the main concern with Cloud services is the lack of response times on major issues.
--
Thanks, Joe


On Thu, May 2, 2013 at 10:16 AM, JoeSox <joesox at gmail.com> wrote:

> Our Technical Support is reporting a big jump in Outlook connectivity 
> issues about 5-10 minutes ago.
> Our resolvers are testing fine.
> --
> Thanks, Joe
>
>
> On Thu, May 2, 2013 at 4:53 AM, Joe Abley <jabley at hopcount.ca> wrote:
>
>>
>> On 2013-05-02, at 02:42, Cathy Almond <cathya at isc.org> wrote:
>>
>> > This may be a red herring, but I've heard of some dropping of DNS 
>> > queries for the names within outlook.com domains where the queries 
>> > are all coming from source port 53 (i.e. your recursive server 
>> > doesn't use query source port randomization
>>
>> ... or there's a NAT or some other box in front of the recursive 
>> server which re-writes the source port...
>>
>> > ).  Might be worth checking what the recursive server you're using 
>> > is doing?
>> >
>> > See https://www.dns-oarc.net/oarc/services/porttest
>>
>>
>> Joe
>>
>
>



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