1. A method for filtering electronic-mail messages on mobile devices, the method comprising: receiving one or more electronic-mail messages addressed to a user; providing the one or more received electronic-mail messages to an inbox associated with the user; evaluating a message from the one or more received electronic-mail messages to determine whether the message is desirable based on at least a user specification; providing a copy of one or more desirable messages from the one or more received electronic-mail messages to a mobile device associated with the user; and notifying the user concerning the copy of the one or more desirable messages.