Patent ID: 6963929

Claim:
An e-mail add-on system comprising: a domain suffix e-mail address representation system including a syntax of a receiver mail address in form of “USERID@DOMAIN.suffix” having a domain suffix (.suffix) selected for an e-mail add-on service and a series of definitions for meaning of the syntax, the domain suffix having a root domain suffix selected in formally registered domain names in the Internet and a supplementary domain suffix for limiting the add-on service represented by the root domain suffix; a relay-mode add-on service mail server installed to an Internet host having a “DOMAIN.suffix” type domain name for receiving a message having a “USERID@DOMAIN.suffix” type receiver e-mail address, the relay-mode add-on service mail server making a new message by processing the add-on service defined in the domain suffix e-mail address representation system and applying options of the add-on service according to contents of the root domain suffix and the supplementary domain suffix specified in “.suffix”, the relay-mode add-on service mail server then relaying the new message to an original receiver address “USERID@DOMAIN”; and a Meta domain name system including a Meta domain name database for showing relation between a “DOMAIN.suffix” type domain name and an IP (Internet Protocol) address of a relay-mode mail server host in charge of the add-on service designated by “.suffix” for the “DOMAIN” portion, and a domain name server software for providing the add-on service.