The option is at Edit Options under User Control Panel, or here:
http://www.yorkietalk.com/forums/pro...do=editoptions
The forum can send a message to your email address to inform you when someone sends you a private message.
Receive Email Notification of New Private Messages
If you do not check that box above, you should not be receiving any email notifications. We have not heard of this not working, if it is not working for you, you may elect to change your email address on file with YorkieTalk to an email address you may not check as often.