Microsoft says you don’t need another email security tool; experts say, not so fast
AI-summarised brief · reviewed before publication
Microsoft claims its Defender catches nearly all malicious email on its own, with integrated third-party tools improving detections by less than 1%. The company's quarterly benchmarking data shows Defender misses the fewest malicious emails compared to competitors and removes nearly 100% of dangerous emails that reach the inbox. However, security experts urge caution, stating that percentages obscure the true quantity and severity of emails that get through. Microsoft's data ranks itself against other security vendors, including Mimecast and Proofpoint, and introduces a new metric for threat miss rate per 1,000 employees. Experts argue that having multiple tools provides real value in defense.
💡 Why It Matters
- · The notion that a single vendor can provide sufficient email security challenges the widely adopted "defense in depth" strategy.
- · Oversimplifying email security risks can lead to complacency, making it easier for malicious emails to slip through.
