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.
S/MIME Support in Webmail
SpeedZone Webmail can verify the validity of incoming S/MIME signatures and display the signature status to the user.
Signature validity is verified against the same root certificates as used in Thunderbird.
Important!
SpeedZone Webmail cannot:
• sign emails
• encrypt emails
• decrypt encrypted emails.
S/MIME signing and encryption must be done in a separate email client, such as Thunderbird or Outlook.