Any action completed on your clixifix account will send a notification to any user with Administrator access, that has their notifications turned on.
To turn notifications off select Admin > Your Users
Select the user you wish to change the notification for, and click edit.
Scroll down page to the field "Receive Notifications" (This user will receive all email notifications created in clixifix)
Click in the box to deselect, which will remove the tick.
Click save at the bottom of the options.
Team members will only receive notifications if they are specifically selected as a recipient or nominated on a defect.