DigiCert Secure Email (S/MIME) Certs vs Beyond Encryption Mailock® Secure Email: 2026 Comparison

DigiCert Secure Email (S/MIME) Certs

Organizations that need legally defensible email encryption without rebuilding their mail infrastructure should start with DigiCert Secure Email (S/MIME) Certs. S/MIME works natively in Outlook, Gmail, and Apple Mail, meaning adoption friction stays low and you avoid the gateway appliance tax. The tool maps directly to NIST PR.AA (authentication via public/private key pairs) and PR.DS (message-level confidentiality and integrity), covering the core email security control most compliance auditors actually care about. Skip this if your threat model demands perfect forward secrecy or sender anonymity; S/MIME signs identities, not conceals them.

Beyond Encryption Mailock® Secure Email

Teams handling regulated data who need proof that sensitive emails were opened, not just sent, should consider Beyond Encryption Mailock® Secure Email; message tracking and revocation give you the audit trail that generic TLS encryption cannot. AES-256 encryption with multi-factor recipient verification covers the NIST PR.DS and PR.AA controls auditors actually ask for. Skip this if your priority is preventing internal data exfiltration rather than securing external communication; Mailock assumes the recipient's inbox is the trust boundary, not an extension of your network.