Mimecast conducts comprehensive Email Security Risk Assessments (ESRA) for organizations using other email security providers, including Microsoft Defender for Office 365. In 2023, these assessments reviewed over 4.4 million emails per month, analyzing threats missed by Microsoft’s advanced security. For every one million emails delivered by Microsoft, Mimecast identified significant exposures to Business Email Compromise (BEC) and other email-borne attacks, demonstrating its ability to detect and block threats that evade existing protections to better secure organizations’ email environments.

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