A method, system and computer program product that creates a transport dictionary, which links preferential terms and definitions to the Multipurpose Internet Mail Extension (MIME) of an outgoing electronic mail (email). Prior to sending a message, users are provided the option of transporting words or acronyms unique to the dictionary of the sender and recipient, which have been utilized in the outgoing email message. Linking dictionary preferences to the outgoing email provides clarity to terms utilized in the email message and decreases the amount of time a responder has to spend skipping, adding, or defining terms that are unique to the incoming MUA dictionary.