Service SSL Certificates Certificate Authority Bundle
Similar to the Sectigo issue, but different. Inbound emails to the server/host itself are failing due to the expired intermediate certificate from "Issuer: cPanel, Inc. Certification Authority ".
Can you please paste the updated CA here so we can apply it in the "Manage Service SSL Certificates" section?
While waiting for the updated CA, if you're unable to send your host inbound emails via SSL, you can fix the issue by removing the Certificate Authority Bundle completely by:
- Log into cPanel Admin
- Select "Manage Service SSL Certificates"
- Click "Apply Certificate to Another Service" (any will do)
- scroll down, check the "Exim (SMTP) Server" box
- scroll even further down, remove the "Certificate Authority Bundle" certificate completely (so it's empty)
- Click "Install"
This will force any validation to go via root certificates, which seemed to work for me and allowed external emails inbound using the "WP Mail SMTP" plugin on Wordpress
PPS - I don't believe you need to reissue the certificate for this fix. Had another domain with the same issue, replaced CA, all checks from sites like SSL Checker passed and things started working again.
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