I have a bit of a problem. I have goggled around and found some answers but nothing that has worked. The problem is I have just switch my email over to office 365. At first we had no problems but then all of a sudden this week we were unable to receive emails from hotmail.com. I have check the DNS and made sure that the SPF and MX records are correct. The email doesn’t leave Hotmail server since there is no record of it on Forefront and the header also makes no mention of office 365 servers. Here is the header from the email:
Authentication-Results: hotmail.com; sender-id=pass email@example.com; dkim=none header.d=mail.hotmail.com; x-hmca=pass
Received: from blu0-omc1-s3.blu0.hotmail.com ([220.127.116.11]) by BAY0-HMMC2-F19.Bay0.hotmail.com with Microsoft SMTPSVC(6.0.3790.4900);
Thu, 30 Aug 2012 00:36:37 -0700
Date: Thu, 30 Aug 2012 00:36:37 -0700
Content-Type: multipart/report; report-type=delivery-status;
X-DSNContext: 7ce717b1 - 1196 - 00000002 - 00000000
Subject: Delivery Status Notification (Failure)
X-OriginalArrivalTime: 30 Aug 2012 07:36:37.0970 (UTC) FILETIME=[30697320:01CD8682]
This is a MIME-formatted message.
Portions of this message may be unreadable without a MIME-capable mail program.
Content-Type: text/plain; charset=unicode-1-1-utf-7
This is an automatically generated Delivery Status Notification.
Delivery to the following recipients failed.
Arrival-Date: Thu, 30 Aug 2012 00:36:28 -0700
Diagnostic-Code: smtp;550 5.7.1 Unable to relay for firstname.lastname@example.org
Received: from BLU168-W37 ([18.104.22.168]) by blu0-omc1-s3.blu0.hotmail.com with Microsoft SMTPSVC(6.0.3790.4675);
Thu, 30 Aug 2012 00:36:28 -0700
Date: Thu, 30 Aug 2012 07:36:27 +0000
Content-Type: text/plain; charset="iso-8859-1"
X-OriginalArrivalTime: 30 Aug 2012 07:36:28.0037 (UTC) FILETIME=[2A7DCB50:01CD8682]
I have tried this on several Hotmail accounts all with the same result. One thing is if I reply to an email that I send to Hotmail it goes through with no problem. It is just a new mail message. There is no problems sending and receiving to other domains just Hotmail. I also have set up a policy in Forefront to allow all email from Hotmail.
One thing is we have a web site that is hosted on a different IP. We have an "a record" pointing to that. I have read that Hotmail is delivering emails based off an "a record" then that could be the only thing I can think of. How could I work around that?