10. A method for an e-mail client system of improving efficiency of email discussion for a conversation among a plurality of authors within an email client, comprising said e-mail client system automatically performing steps of: filtering a special tag in email contents, said special tag being inserted at a tag composition component of an email client, extracting original email contents, and identifying tag related information which includes at least an author name corresponding to extracted original email contents; keeping the tag related information, identifying which part of the extracted original email contents is written by which author according to the tag information, and assigning correct style to corresponding extracted original contents using a user customization style for each author, wherein extracted original email contents for each of said plurality of authors is assigned a different style; and generating and displaying the email discussion in a single generated email for a conversation among a plurality of authors wherein the email discussion is generated in a single email by organizing extracted original email contents with a different style for each of said plurality of authors.
10. A method for an e-mail client system of improving efficiency of email discussion for a conversation among a plurality of authors within an email client, comprising said e-mail client system automatically performing steps of: filtering a special tag in email contents, said special tag being inserted at a tag composition component of an email client, extracting original email contents, and identifying tag related information which includes at least an author name corresponding to extracted original email contents; keeping the tag related information, identifying which part of the extracted original email contents is written by which author according to the tag information, and assigning correct style to corresponding extracted original contents using a user customization style for each author, wherein extracted original email contents for each of said plurality of authors is assigned a different style; and generating and displaying the email discussion in a single generated email for a conversation among a plurality of authors wherein the email discussion is generated in a single email by organizing extracted original email contents with a different style for each of said plurality of authors. 11. The method of claim 10 , wherein: filtering the special tag in the email contents is implemented by a general string matching algorithm using scripts on the email client.