Control Panel => Registration Settings =>

"Primary Registration Contact - Valid Email Required
The email address where all registration notification messages will go. This address will also be used as the contact email for any registration questions. This email address can be the same as your primary contact email address, if you like. Note: All email having to do with registration on your board will come from this email address. Ensure this is a valid email address!"

Control Panel => General Display Settings =>

"Support Email Address (Valid Email Required)
This email address will be listed on the board, so that users may contact you. Note: All email from the board (except registration) will come from this email address. Ensure this is a valid email address!"

Hope this helps.. <img src="https://www.ubbcentral.com/boards/images/graemlins/smile.gif" alt="" />