What it does
CipherMail provides an SMTP-compatible email-encryption gateway with S/MIME, PGP, TLS and PDF encryption. A webmail messenger can provide protected access when a recipient cannot use S/MIME or PGP.
CipherMail is a gateway rather than a replacement personal inbox. It sits in the mail flow and centrally applies encryption or signing. The documented standards include S/MIME and PGP, with TLS and encrypted PDFs as other routes.
When standard encrypted delivery is unavailable, its Webmail Messenger gives the recipient a browser-based way to read the message. That fallback can matter in a mixed environment where some organizations use certificates and others do not. The company offers community open-source and commercial licensing, so choose the edition around deployment and support requirements.
Strengths
- The gateway works with SMTP-based mail services.
- S/MIME, PGP and browser-based fallback workflows are documented.
- Community open-source and commercial editions are offered.
Best for
- Mail administrators who want centralized encryption across mixed recipient environments
Sources
- CipherMail email encryption and digital signatures (Oct 26, 2026)
- CipherMail official project license (Oct 26, 2026)