Could not send email to office 365

Thu May 2 17:16:06 UTC 2013

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
>