How to disable notifications for a particular service in Health Monitoring?
In Plesk go to Health Monitoring and click Download Configuration File.
Open the downloaded configuration file in any text editor.
To exclude notifications for a particular service, find a block of this service and block it with "<!--" and "-->". Below is an example of blocking nginx notifications.
<service name="WebProxy" monitor="true">
<alarm level="red" threshold="1" type="percent"/>
<alarm level="yellow" threshold="1" type="percent"/>
Upload the edited file back by clicking Upload Configuration Files.
Note: Along with email notifications Plesk will no longer show Needs attention/Problem status in the Server Health section, if the excluded service consumes a lot of resources.