See how Microsoft Defender performed in one year of real-world email security benchmarking against SEG and ICES vendors.

Computer scientists have uncovered a shockingly prevalent misconfiguration in popular enterprise cloud-based email spam filtering services, along with an exploit for taking advantage of it. The ...

Beware this highly sophisticated Microsoft 365 attack. Update, March 15, 2025: This story, originally published March 13, has been updated with further technical detail regarding the Microsoft 365 ...

A series of unfortunate and cascading mistakes allowed a China-backed hacking group to steal one of the keys to Microsoft’s email kingdom that granted near unfettered access to U.S. government inboxes ...

Microsoft's new deliverability requirement will have an outsized effect on B2B marketers, with other additional recommendations also likely to impact them more than their B2C counterparts. Let's break ...

Need some help filtering using Mail Transport Rules on O365: a couple of users keep getting spammed/harassed by a crazy person (yes, definitely) and every time we block an email address it pops back ...

Scam emails are getting better at looking official. This one claims to be an urgent warning from Microsoft about your email account. It looks serious. It feels time sensitive. And that is exactly the ...