Email Security & Sender Authentication Audit
Perform a unified authentication audit for any domain. Evaluate SPF records, DKIM key signatures, DMARC policies, BIMI profiles, MTA-STS enforcement, and TLS-RPT reporting.
The 4 Pillars of Modern Email Security
Enterprise email authentication protects domain reputation against phishing, spoofing, and business email compromise (BEC) through four complementary internet standards.
Protocol Overview
- SPF (RFC 7208): Authorizes sending mail server IP addresses and subnets in DNS.
- DKIM (RFC 6376): Attaches a verifiable cryptographic signature to message headers.
- DMARC (RFC 7489): Aligns SPF and DKIM while enforcing handling policies (none, quarantine, reject).
- MTA-STS (RFC 8461): Enforces TLS encryption for inbound SMTP mail transport.