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What Is BIMI and How Does It Strengthen Inbox Security?

By Sectigo Team
January 15, 2026

BIMI (Brand Indicators for Message Identification) is an email authentication standard that strengthens inbox security while enhancing brand visibility. By displaying verified brand logos in supported inboxes, BIMI helps users quickly identify legitimate emails and avoid phishing attempts. Built on foundational protocols like SPF, DKIM, and DMARC, BIMI requires strict authentication enforcement and logo validation through Verified Mark Certificates (VMCs) or Common Mark Certificates (CMCs). The result is improved trust, reduced impersonation risk, and stronger engagement for organizations that rely on email as a core communication and marketing channel.