Patent ID: 8090781

Claim:
A communication terminal having an email message sending-and-receiving function, the communication terminal comprising: means for storing email-message information of at least a sent email message as email-message history information; storing means for storing email-message information of an intended-to-be-sent email message that is being prepared at said communication terminal, the intended-to-be-sent email message being an email message which has yet to be sent from the communication terminal, as intended-to-be-sent email message information; means for determining at the communication terminal whether a destination address of the intended-to-be-sent email message is right or wrong by comparing the email-message history information with at least a message body of the intended-to-be-sent email message information; means for displaying a notification of the wrong destination address to a user if the destination address is determined to be wrong and requesting the user to check the destination address prior to sending the email message from the communication terminal; and means for extracting keywords per target address from the email-message history information and extracting keywords from the message body of the intended-to-be-sent email message, wherein the means for determining determines whether the destination address of the intended-to-be-sent email message is right or wrong by comparing the keywords extracted from the intended-to-be-sent email message information with those extracted from the email-message history information.