Here is a quick way to disable SuiteCRM email notification. Please note that the following option will disable all the notifications from all the modules and not only the selective modules. This is useful when you are the only one using the CRM and don’t want to be notified.
This is tested on SuiteCRM version 7.9.7 and 7.11.4
Step 1: Go to Admin
Step 2: Click on “Email Settings”
Step 3: Uncheck box “Email Options” > “Assignment Notifications”