3. A method for generating an email message comprising: receiving message data for generating an email message addressed to a user at a destination system; analyzing the message data to identify one or more sections of the received message data, each section consisting of characters having the same formatting characteristic; converting the message data to a platform-independent format; generating an image set comprising character images having a single formatting characteristic found in one or more of the identified sections of the message data, and generating a set of replacement instructions for use at the destination system to render the message by replacing each character specified in the platform-independent format with a character image retrieved from one of the image sets; generating an email message addressed to said user at said destination system, said message comprising said message data in platform-independent format, said image set and said set of replacement instructions; and identifying a lowest common denominator of identified characters in the message data for use in generating character images for said image set.
3. A method for generating an email message comprising: receiving message data for generating an email message addressed to a user at a destination system; analyzing the message data to identify one or more sections of the received message data, each section consisting of characters having the same formatting characteristic; converting the message data to a platform-independent format; generating an image set comprising character images having a single formatting characteristic found in one or more of the identified sections of the message data, and generating a set of replacement instructions for use at the destination system to render the message by replacing each character specified in the platform-independent format with a character image retrieved from one of the image sets; generating an email message addressed to said user at said destination system, said message comprising said message data in platform-independent format, said image set and said set of replacement instructions; and identifying a lowest common denominator of identified characters in the message data for use in generating character images for said image set. 4. A method according to claim 3 wherein analyzing the message data to identify one or more sections, each section consisting of characters having the same formatting characteristic further comprises determining a number of blank spaces in the email message for replacement with a generated blank image.