Going from post to post, to disrespecting people isn’t something you should do.
I never said not to look at dovocot’s own repo.
@DavidAlberto If you installed an unsupported Os, it might cause issues, someone installed ubuntu 18, and got problems, re-installed ubuntu 20, and fixed the problem.
An easier way to fix email issues is to use the CyberPanel Cloud debugger.
Also, the latest stable version of CyberPanel (2.3.2) uses SnappyMail.
So if you still have rainloop, try upgrading CyberPanel, to get SnappyMail.
Doing this in SSH:
sh <(curl https://raw.githubusercontent.com/usmannasir/cyberpanel/stable/preUpgrade.sh || wget -O - https://raw.githubusercontent.com/usmannasir/cyberpanel/stable/preUpgrade.sh)
Then the URL of rainloop changes from
https://IP:Port/rainloop/
to
https://IP:Port/snappymail/
If you want to use outlook on phones or other applications, follow the tutorial by usman below.
6 - Self-signed SSL error on Outlook/Thunderbird - Docs / 06 - Email - CyberPanel Community