Log in as a user with the 'Jira Administrators' global permission.
Navigate to Admin menu → Projects and search for the desired project.
At Project settings section locate Portal Notifications tab.
Jira Notifications
Notifications will be sent according to the existing project configuration. Read more about Jira notifications.
To enable Jira Notification for Idea Portal check the Use Jira Notifications box at the Portal Notifications tab.
Portal Notifications
Portal Notifications allows you to set a separate configuration for Idea Portal notifications.
Idea Notifications
Idea Notifications can be generated for the following events:
Idea status changed
Idea created
Idea deleted
Idea updated
Idea votes down
Idea votes updated
Idea votes up
Possible Recipients:
Reporter
Assignee
Follower
Ideation users
Administrators
Ideation moderators
Comment Notifications
Comment Notifications can be generated for the following events:
Idea comment created
Idea comment deleted
Idea comment updated
Idea comment votes down
Idea comment votes updated
Idea comment votes up
Idea response to comment created
Idea response to comment deleted
Idea response to comment updated
Possible Recipients:
Reporter
Assignee
Follower
Comment Author
Parent Comment Author
Ideation users
Administrators
Ideation moderators
To enable or disable a notification, check/uncheck the Enable box.
To exclude the current user from notification recipients click on 
icon at the Actions section.
To test a particular notification click Send test mail.
