dear if u have BB handheld it desn't allow ur emails on ur handheld. for that u should have BB services e.g.e BIS or BES. BIS is the service that is provided by ur Carrier (services provider) e.g Ufone
in my case, that allow ur handheld to communicate with that server on which ur email account is present. when u have apperes EDGE or GPRS in capital then go to ur carreir site e.g www.ufone.black.berry.com
in my case then adde ur working email address and ur free POP or IMAPI email address e.g Yhaoo. Gmail. Hotmail if its Paid.