UPD 31.08.2022: Exim bug causing mail not to be received on CentOS and AlmaLinux 8 was fixed in versions 6.56.3 (stable) and 6.57.1 (beta).
Users may experience failures in the mail server deployed through ISPmanager. This is relevant only for ISPmanager installed on CentOS.
Despite the fact that the problem is not on the ISPmanager side, within 24 hours (until September 1, 2022) we will release an update with a bug fix for the configuration file. Until then, however, you can make settings that will allow you to use email.
We will keep you informed of the situation with Exim and let you know when a panel update will be released to fix this bug. Follow the news on the blog . You may contact thetechnical supportwith any questions..