With Rule Exceptions a team member can reduce notifications by exception type or by version of the project.
If a rule is created for a NullReferenceException by Exception Type, future entries of that type will be dismissed and no email will be sent.
If an entry has a rule created based on Exception Details (Version Specific), it will use the stack trace and version number of the project to determine if it should be ignored. If the same type of exception occurs elsewhere in your solution, or if it occurs again with a different project version, it will no longer be ignored.
You can view and delete existing rules in the Ignore Rules navigation menu item.