Frequent Email is not configured properly notice

[SansGuidon]

Hey,

This is now a regular thing I notice on my Cloudron instance,
The email settings page always show everything is fine but during the night I get those notifications that email configuration have problems and those notifications disappear after some time.

I don't know what to do to remediate this or what to look for exactly when this happens especially as DNS configuration is fine and email status is good.
What is annoying is that I can't keep track of how often this happens as the notifications do not persist forever.

I'm not hosting emails on Cloudron but it's configured to work with two domains and the emails are correctly sent from my instance for those domains, for notifications etc.

Any time I'll check to remediate those alerts, the email status page shows everything is fine.

Any help is welcome

[jayonrails]

Please click on the notification, it shall tell you what’s not working as expected

[SansGuidon]

The notification tells something about a wrong value for PTR record but the email status page tells this PTR record is fine. I don't know which to believe?