Comments From Email Trigger Notifications for "Issue Updated" Instead of "Issue Commented" Event

Summary

In the notification scheme, no one is set to receive Issue Updated, but users are set to receive Issue Commented. When a comment is added via email, nobody gets notification. When a comment is added via UI, they get notification for Issue Commented.

After some testing I found that commenting via email will trigger Issue Updated, that is the reason users don't receive notification even though they are supposed to receive for Issue Commented. By right commenting via email and UI should behave the same and trigger Issue Commented and users should get notification.

Steps to reproduce

1. Install JIRA
2. Configure Incoming Mail Handler (Create a new issue or add a comment to an existing issue) and Outgoing Mail
3. Remove everyone from Issue Updated event but make sure they receive notifications from Issue Commented event
4. Have a user add a comment to a particular issue via email

Expected Results

1. Comment added successfully
2. Designated users receive notification
3. Notification sent with Issue Commented event

Actual Results

1. Comment added successfully
2. No notification received by users who supposed to receive Issue Commented event

Notes

• When the users are configured to receive notification from Issue Updated event, then commenting via email will send notifications to the designated users
• Affecting with JIRA 6.3.10 and 6.3.12
• With 6.2.7, notification will be of Issue Commented event (intended behavior)