The Mailfence SSL/TLS Certificate

When accessing, the transmission of data between your browser and our servers in Brussels-Belgium is always encrypted and protected by SSL/TLS – for which each website has a (Public Key) Certificate that is verified by a trusted Certificate Authority (CA).


Mailfence, a secure and private email-suite, uses Let’s encrypt CA.

A modern browser should automatically check the validity of the Mailfence SSL/TLS certificate and alert you if it detects something untrustworthy. For security-conscious users who want to manually check, our SSL/TLS certificate fingerprints/thumbprints [valid until 27/July/2022, 12:33 PM (Central European Summer Time)] are:

SHA1 fingerprint:


SHA-256 fingerprint:


If this matches what you see in your browser, then you know you are communicating with the real Mailfence website and using the correct public key to encrypt your sensitive information and only Mailfence can decrypt it.

Last updated: Thursday, 28th of April 2022
Next update date: Wednesday, 27th of July 2022


  • For Chrome:
    1. Click on the green padlock in the address bar.
    2. Click on the Certificate.
    3. In General, verify that the Fingerprints (SHA1 & SHA-256) matches the one’s above.
  • For Firefox:
    1. Click on the lock button in front of the URL and click on the Arrow on the right side of the dropdown.
    2. Click on More Information.
    3. Go to Security and click on View Certificate.
    4. Verify that the Fingerprints (SHA1 & SHA-256) matches the one’s above.
  • For Safari:
    1. Click on the lock button in front of the URL.
    2. Select Show Certificate, in Details scroll to the bottom of the page.
    3. Verify that the Fingerprints (SHA1 & SHA-256) matches the one’s above.

Note: Make sure, in your browser, you are looking at the leaf certificate (, * This certificate does not cover and domain names.

For further assistance, feel free to drop us an email at

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– Mailfence Team

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Mailfence Team

End-to-end encrypted e-mail service that values and respects your privacy without compromising the ease-of-use. @mailfence @mailfence_fr

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