Email Options 
Use the vBulletin Options > vBulletin Options > Email Options setting group to setup the behaviour of your email features throughout the board.

Here you can setup everything related to how your forum sends and handles email.
Warning:
To obtain your SMTP information, you will need to contact your SMTP provider. This is not information that can be obtained through vBulletin or from support staff.
User Contributed Notes: Email Options Add a Comment