Microsoft Defender Leads in Email Security Benchmarking Reports

Microsoft continues to excel in email security benchmarking reports, showcasing strong performance across pre-delivery and post-delivery scenarios.

The company's Defender solution missed the fewest high-severity threats among evaluated solutions, about 55% fewer than the next-closest secure email gateway (SEG) vendor.

Layered security adds significant value in promotional and bulk filtering but yields modest gains for spam and malicious emails.

In the latest benchmark period from May to July 2026, Defender missed 221 high-severity threats per 1,000 protected users, a 55.4% improvement over the next-closest SEG vendor.

The results emphasize the importance of continuous measurement in protection against evolving threats and defenses.