In Birdview all email notifications are governed by personal notification preferences.

To access the settings:

1. Click your login picture.
2. Select My Settings.
3. Select Notifications.  

Now, you can disable notifications by disabling the "Send me email notifications" option under "Email Notifications".

Exceptions

You cannot disable email notifications altogether, as you will always be notified about:

1. Your assignments;
2. When people @mention you; and
3. Approval requests.