A major revolution for the automated office is electronic mail .The customary postal system requires messages written on paper to be transmitted physically from one location to another. With E-mail, messages are converted into electronic signals, transmitted anywhere in the word, and then changed back into the original written forms, all in several or minutes at most.Through computer monitors placed in company offices, a single document can be transmitted to hundreds of people in dozens of branch offices at the same time. Therefore, E-amil, along whith databases, can be an important asset for teleconferencing. Besides, the use of E-amil in the from of a " mailbox " attached to a telephone is of great value. Because many calls go uncompleted on the first attempt , E-mail reduces telephone ues and save time.