Currently Being ModeratedDec 5, 2012 6:25 PM (in response to irafrombenicia)
There really isn't anything to set up. It depends on what type of email account you have. IMAP and Exchange email accounts support this; POP accounts do not. If you want this behavior make sure you are using an IMAP account such as iCloud or Gmail, or and Exchange account such as your employer's email.
Currently Being ModeratedDec 5, 2012 6:31 PM (in response to randers4)
Had to go into the adv. settings of the comcast mail & made sure when I delete a piece of mail it is removed from the served. Thanks!