1. In an electronic messaging system operable to send and receive electronic messages over a first network and also operable to redirect electronic messages over a second network to a wireless device, a method of encrypting electronic messages comprising: receiving an electronic message that is protected by a first encryption algorithm and addressed to a message recipient in the first network, the message recipient having an associated wireless device operable in the second network; determining that the electronic message is to be transported across the second network to the wireless device; and in response to determining that the electronic message is to be transported across the second network, encrypting the electronic message using a second encryption algorithm and transmitting the encrypted message over the second network to the associated wireless device, the second encryption algorithm being a more secure security method than the first encryption algorithm.