S/MIME (Secure/Multipurpose Internet Mail Extensions) is a standard for signing and encrypting e-mails end-to-end. Usually signing, verifying and encrypting/decrypting is done by the mail client.

Using S/MIME with your standalone email client such as Thunderbird, Outlook or Apple Mail is supported.

Zone does not currently provide built-in support of S/MIME in Webmail.

If S/MIME support in Webmail is something you’d like to see, let us know.

Updated on 9. Aug 2022

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