System and method for compressing secure E-mail for exchange with a mobile data communication device

A system for reducing size of an encoded message for transmission to a wireless mobile communication device, the system comprising:

• a host system configured to receive the encoded message from a message sender addressed to at least one message receiver, the encoded message comprising a digital signature, a certificate, and a message body;
• and
• a wireless connector system associated with the host system and configured to determine whether any of the at least one message receiver has a corresponding wireless mobile communication device, and, for each message receiver that has a corresponding wireless mobile communication device:
• rearrange the digital signature and certificate in the encoded message so that the message body is transmitted to the wireless mobile communications device before the digital signature and the certificate;
• and
• transmit the processed message to said corresponding wireless mobile communication device.

A non-transitory computer readable medium storing instructions executable by a processor, the instructions for carrying out a method of reducing size of an encoded message at a host system before the encrypted message is transmitted to a wireless mobile communication device, the method comprising:

• receiving at the host system the encoded message from a message sender addressed to at least one message receiver, the encoded message comprising a digital signature, a certificate, and a message body;
• and
• determining whether any of the at least one message receiver has a corresponding wireless mobile communication device;
• and
• for each message receiver that has a corresponding wireless mobile communication device:
• rearranging the digital signature and certificate in the encoded message so that the message body is transmitted to the wireless mobile communications device before the digital signature and the certificate;
• and
• transmitting the processed message to said corresponding wireless mobile communication device.