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This extension is no longer available on the Chrome Web Store. We noticed it was gone on Jul 14, 2025.
Send and receive encrypted email messages using the S/MIME technology. CypherMail allows to exchange encrypted email messages. The encryption is S/MIME standard, the solution recommended by the security experts, and it is based on certificates. The certificates are generated on the fly when an email address is used. They are issued by an internal PKI that generated certificates with emailProtection key extended usage.
The main CypherMail features are: