Disabling outgoing notifications
This recipe shows you how to completely prevent JIRA from sending out e-mails. You may need to do this if you are performing testing, data migration, or cloning a new development instance, and do not want to flood users with hundreds of test notifications.
How to do it...
Proceed with the following steps to disable outgoing notifications in JIRA:
Navigate to Administration | System | Outgoing Mail.
Click on the Disable Outgoing Mail button.
Once you have disabled outgoing mails, JIRA will no longer send out notifications.