EAST Anti-Phishing Tool vs Mimecast DMARC Analyzer: Side-by-Side Comparison (2026)

EAST Anti-Phishing Tool

Microsoft 365 administrators managing credential phishing at organizations under 5,000 users will find real value in EAST Anti-Phishing Tool because the CSS-based deployment model actually stops phishing pages from rendering correctly on your own login portal, blocking the attack before users even type credentials. The free model with no per-seat licensing means you get Entra-native protection without budget negotiation; deployment takes under an hour through the portal interface. Skip this if your environment runs hybrid identity systems outside pure Entra or if you need detection and response capabilities beyond the login page itself.

Mimecast DMARC Analyzer

Organizations that need to stop domain spoofing at the authentication layer should use Mimecast DMARC Analyzer, particularly if your team lacks deep DNS expertise; the record setup wizard and managed services handle the heavy lifting that usually trips up smaller security shops. The tool covers all three authentication protocols (SPF, DKIM, BIMI) with real-time monitoring and forensic reporting that actually tracks source IP and geography, which matters when you're investigating which attacker is abusing your domain. Skip this if you're already running mature DMARC infrastructure with in-house policy tuning capability; the value proposition softens once you've moved past initial implementation.