Problem

In service desk projects we can create custom notification events and edit transition post-functions in the workflow to disable notifications only for service desk agents. But this solution is not working for Service Desk Customers

For customers, we can control the email notifications from Project Settings / Customer Notifications and it has some limitations based on Jira's functionality. Not all transactions exist for the customer-type notifications such as canceled or closed.

Workaround

Go to request types workflow from request types page
And map the last status Closed to the same status Resolved in the Customer portal for every single request type. This is not a really maintainable/scalable solution for 30+ or even more request types.

Suggested Solution

It would be nice to include customer-based settings in Notification Scheme or expand the Customer Notifications selection.