BlackBerry® is different from the other mobile email solution in the following ways:

• BlackBerry® emails are ‘pushed’ to the handset, whereas in most of the other solutions, emails have to be ‘pulled’ by the user. Therefore, under BlackBerry® the email is received instantaneously on the handset without any intervention on the part of the user; whereas under pull-based solutions, the user will have to continuously keep ‘synchronizing’ failing of which his/her email will not get delivered to the handset
• BlackBerry® supports (a) Lotus Domino, and (b) MS Exchange