New security certificate

Created at 17.January 2022, 11:00 | Category: Info

Dear Posteo customers,

Over the next few days we will update our main security certificate. Security certificates are only valid for a specified time period and need to be renewed from time to time. Because of this, we will be changing this certificate before January 28, 2022.

In most cases, you will not notice any change.
All clients like Thunderbird or Outlook will automatically find the new certificate. You do not need to do anything. However, should your client display a certificate error during this changeover process, please restart your client. This should fix the error.

If you manage the trustworthiness of certificates manually, you can find the fingerprint for the new main certificate that we will shortly begin using below. You can also find complete fingerprints for all certificates in our legal notice.

New fingerprint for the TLS security certificate for posteo.de:

Geotrust:
SHA256: A5:11:E3:82:F2:EE:3C:2A:79:6C:0D:6B:3B:D7:DB:BF:7C:C3:2C:0C:7F:E0:3F:E8:93:A4:42:27:CC:5C:30:60
SHA1: BF:6D:27:28:FD:32:DC:3A:A6:78:74:5E:76:D3:8D:92:06:69:7A:4C

Best regards,
The Posteo Team