Ensure your SPF Record is Correct

Update: Feb 26, 2015 – A great post about Office 365 SPF checks was recently written by one of our program managers which I would high recommend reading. How Office 365 does SPF checks for customer-to-customer mail   I've recently seen an increase in cases that involve incorrectly published SPF records that have resulted in…

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Daisy Chaining with EOP

Update Dec 23, 2014 – I’ve revised this article to make a couple of points clearer. On the mail flow side there are no issues with daisy chaining. However, if the intent is to evaluate the effectiveness of EOP filtering, having a service sit in front of EOP will not allow EOP to show it's full…

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One MX to Rule Them All

Before I start I would like to call out that I think this is the best blog title that I have come up with to date. Surprisingly, or maybe not, I thought of this title and article while I was playing Ultimate Frisbee. My mind was obviously not in the game, and we did lose……

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