To ensure the security of our email system, we have updated all secure certificates across all of our mail clusters. This was a planned update every two years, and there no current security threats.

The full details of the updated certificate, including fingerprints, can be viewed before and after accepting the certificate. In Mac Mail, for example, when the message appears saying it could not verify the certificate, selecting "Show Certificate" will display all the details. Viewing the certificate details should be possible from any email client.

Mac Mail users: You may see "Mail can't verify the identity of the server mail.domain.com" with the options to "Show Certificate" or "Continue". It may take 2-3 tries with the Continue button for it to be accepted. Select "Show Certificate", and there are "Trust" options there to accept the cert. If it still cannot connect after these attempts, please use your mail cluster for the Mail Server name on your account (ex: mail.yourdomain.com).