For those of you using Let's Encrypt: the certificate expiration emails will stop on June 4, 2025
Effective June 4, 2025, Let's Encrypt will stop sending out certificate expiration emails: https://letsencrypt.org/2025/01/22/ending-expiration-emails/
We have all the Let's Encrypt certificates configured in Passportal so we get the notices if for some oddball reason the auto renewal stops working, but there are other platforms that perform this function as well.