1. A method for securing e-mail communications with a mobile terminal, the method comprising: maintaining information concerning a plurality of mobile terminals, the information comprising encryption information and an identifier for each mobile terminal; receiving a service activation code comprising encryption information and an identifier from an authenticated user of the mobile terminal, wherein the encryption information from the service activation code is provided to a connectivity function for use in establishing an encrypted data channel; and using the established encrypted data channel to convey e-mail communications to and from the mobile terminal.