1. A method for processing messages at a mobile communications device, wherein a first message is received at a first computer identified by a first address, and a second message is received at a second computer identified by a second address, and wherein the first and second messages are redirected from the first and second computers to the mobile communications device, the method comprising the steps of: receiving the first message at the mobile communications device, wherein the first message is packaged within an envelope addressed using a third address that identifies the mobile communications device; removing the envelope from the first message; displaying the first message at the mobile communications device; generating a first reply message to the first message, wherein the first reply message is addressed using the first address as an originating address of the first reply message; receiving the second message at the mobile communications device, wherein the second message is packaged within an envelope addressed using the third address that identifies the mobile communications device; removing the envelope from the redirected second message; displaying the second message at the mobile communications device; and generating a second reply message to the second message, wherein the second reply message is addressed using the second address as an originating address of the second reply message.