Server JIRA Service Desk 4.4.23
Under Project Settings > Customer notifications > Edit templates
We updated several times the template,
e.g removed the "View request:" and "Turn off this request's notifications"
however in the email we kept receiving the default with the above included.
Also the attribution had a very long URL which is not visible in the template text area and the preview.
It turns out that the content in the HTML tab is NOT taken into account, although that is saved.
We had to switch to Text tab in order to view the correct template content, and get it to work.