Patent ID: 7444322

Claim:
An electronic mail device comprising: a mail accepting unit accepting an input of an electronic mail as a processing object; a keyword extraction unit obtaining a keyword from the electronic mail, wherein the keyword is at least one of: a character string delimited by the start point and the end point; information about an existing area of a sender or about a pre-registered recipient; a date and time recorded in relative time since a date and time of transmission, an absolute date and time obtained from the present date and time, or the present date and time; or a character string delimited by the start point and the end point, wherein one of: strings of words of titles of saved mail and the input electronic mail are perfectly coincident with each other; strings of words of titles of saved mail and the input electronic mail are coincident forwards; or a value given by (a number or words used in common throughout respective titles of saved mail)/(a total number of words) is obtained, and the value is equal to or greater than a predetermined value; a search unit searching for additional information corresponding to the keyword from an additional candidate storage unit stored with candidates for the additional information to the mail previously processed; an additional information selection unit accepting, in a case where the search unit has searched out plural pieces of additional information, a selection, from a list of the plural pieces of additional information, wherein the list has been sorted on a basis of a history of mails previously transmitted or received; and an adding unit adding the accepted selection to the electronic mail as a processing object, in the case where the search unit has searched out plural pieces of additional information.