1. A computer-implemented method for transmitting an email message from a sender to a selected recipient, the selected recipient capable of receiving only email messages compliant with American Standard Code for Information Interchange (ASCII), and one or more of the sender or other recipients having a non-ASCII email address, the method comprising the steps of: creating corresponding mapped ASCII email addresses for each of the non-ASCII email addresses by: generating a username as a mapping of the non-ASCII email address using a predefined mapping algorithm; selecting a domain name from one or more predefined domain names, each of the domain names configured to resolve to a predefined gateway server; and concatenating the username and the domain name to create the mapped ASCII email address; replacing the non-ASCII email addresses with the corresponding mapped ASCII email address; and transmitting the email message to selected recipient.