The user must have the following permissions to get notifications:
Access the settings for this feature via:
The user will get notifications when watching an issue or repository. The user will receive repository commit notifications if that repository is being watched by the user. If the user watches an issue, any commit related to the issue will be sent to that user as notifications.
By default, Jira email notification format is text-only.
You can change this setting to HTML by going to User Profile > Preferences. Click the Edit icon.
The following dialog is displayed:
Change the Email Type to HTML. Click Update to save the changes. The email notifications that you receive will now be in HTML format.