Hypertext transmission method and server apparatus for sending and receiving files other than HTML files

A method and an apparatus for processing e-mail with only a WWW browser. An HTML file is requested using the WWW browser on a user terminal apparatus. An Internet connection service provider apparatus (Internet Service Provider) using the HTML file request as a trigger automatically acquires a user's e-mail and then converts the e-mail to HTML format for storage. If e-mail is present, a markup tag to the e-mail list is added to the requested HTML file and transmitted to the user terminal apparatus. When the user selects this tag, the Internet connection service provider apparatus retrieves the corresponding e-mail HTML file and returns it to the user.