I just pored through our own email logs – the issue first cropped up at 4:17 pm Central and the last failure I see is 5:01 pm, Central. But looking at delivery, the last delivery was at 4:22 pm and the first delivery was at 4:58 pm. So different domains may have started resolving at different times. Frank From: Outages [mailto:outages-bounces@outages.org] On Behalf Of Frank Bulk via Outages Sent: Tuesday, October 21, 2014 6:26 PM To: 'Josh Luthman' Cc: outages@outages.org Subject: Re: [outages] Email to Microsoft Office 365 users I received two confirmations off list of the issue – thanks. The one observed it from 4:27 pm and 5:11 pm, Central. Josh, you were checking just the MX records, but before any email server can actually connect to the email server it has to resolve staples-com.mail.protection.outlook.com, which was not working at the time of my original post. Frank From: Josh Luthman [mailto:josh@imaginenetworksllc.com] Sent: Tuesday, October 21, 2014 5:20 PM To: Frank Bulk Cc: outages@outages.org <mailto:outages@outages.org> Subject: Re: [outages] Email to Microsoft Office 365 users I'm not seeing it on my servers or a couple others... C:\Users\jluthman>dig MX staples.com <http://staples.com> +short 10 staples-com.mail.protection.outlook.com <http://staples-com.mail.protection.outlook.com> . C:\Users\jluthman>dig MX staples.com <http://staples.com> +short @4.2.2.2 <http://4.2.2.2> 10 staples-com.mail.protection.outlook.com <http://staples-com.mail.protection.outlook.com> . C:\Users\jluthman>dig MX staples.com <http://staples.com> +short @208.67.222.222 <http://208.67.222.222> 10 staples-com.mail.protection.outlook.com <http://staples-com.mail.protection.outlook.com> . C:\Users\jluthman>dig MX staples.com <http://staples.com> +short @pdns131.ultradns.com <http://pdns131.ultradns.com> 10 staples-com.mail.protection.outlook.com <http://staples-com.mail.protection.outlook.com> . Josh Luthman Office: 937-552-2340 Direct: 937-552-2343 1100 Wayne St Suite 1337 Troy, OH 45373 On Tue, Oct 21, 2014 at 6:01 PM, Frank Bulk via Outages <outages@outages.org <mailto:outages@outages.org> > wrote: Our last queue check reported DNS failures looking up <domain name>.mail.protection.outlook.com <http://mail.protection.outlook.com> for 11 such domains. Just picking one, staples.com <http://staples.com> : root@nagios:/tmp# dig MX staples.com <http://staples.com> +short 10 staples-com.mail.protection.outlook.com <http://staples-com.mail.protection.outlook.com> . root@nagios:/tmp# dig staples-com.mail.protection.outlook.com <http://staples-com.mail.protection.outlook.com> ; <<>> DiG 9.7.3 <<>> staples-com.mail.protection.outlook.com <http://staples-com.mail.protection.outlook.com> ;; global options: +cmd ;; connection timed out; no servers could be reached root@nagios:/tmp# root@nagios:/tmp# host MX staples.com <http://staples.com> ;; connection timed out; no servers could be reached root@nagios:/tmp# Anyone else seeing this? A colleague says that O365 is having issues and will be forwarding me some details. Regards, Frank Bulk _______________________________________________ Outages mailing list Outages@outages.org <mailto:Outages@outages.org> https://puck.nether.net/mailman/listinfo/outages