Abstract: Provided is a method for providing an electronic document transmission notification service for notifying transmission of the electronic mail That a sender creates and transmits to a receiver. The method is achieved by storing an email address of the receiver with a mobile phone number and a name on a database, simultaneously displaying an email writing window and a text message transmission window on a screen when the sender accesses a mail site and selects writing an e.mail (a first display step), when a receiver's email address is selected from the e.mail writing window, searching for a mobile phone number corresponding to a selected e.mail address and displaying the searched mobile phone number on a receiver's mobile phone number section (a second display step), when the sender writes a title and a content of an e.