In Console, access the Create User or Edit Entry window, as described in To Access Mail Users
Click the Mail tab.
Click the Delivery tab.
Select the delivery method or methods you want to enable for this user:
To specify POP/IMAP delivery, follow the instructions in Specifying POP/IMAP Delivery
To specify program delivery, follow the instructions in Specifying Program Delivery
To specify UNIX delivery, follow the instructions in To Specify UNIX Delivery
Click OK at the bottom of the Edit Entry window if you have finished making changes to this user’s mail information. Otherwise, click other tabs to continue making changes.