Did You Know? Sign & Encrypt Your Zimbra Mail with S/MIME

Did you know that you can send signed and encrypted email in Zimbra?

If you have a job that requires complete email security, such as sending signed or encrypted email, you can do that right in your Zimbra Web Client using Zimbra’s S/MIME functionality.

Watch this 4-minute demo to see how easy it is!

The demonstration is also available with Spanish subtitles here.

If your organization has enabled this functionality, follow these easy steps to send signed email:

1. To send signed email: Add your certificate in the Zimbra Preferences > Secure Email tab. You can easily download a free certificate from sites such as Comodo.
2. Select Sign from the menu when composing email. You can also set this as a default in your Preferences > Secure Email tab.

Follow these easy steps to send encrypted email:

1. To send encrypted email: Add your recipient’s public key to his or her contact in your Zimbra account. The recipient has to email you this public key certificate.
2. Select Sign and Encrypt from the menu when composing email. You can also set this as a default in your Preferences > Secure Email tab.

In either case, the recipient of the email will see a “Security” line in the email header showing “Signed” or “Signed and Encrypted” followed by your Zimbra email address.

Visit our wiki if you are interested in more technical information.

Thanks for reading!