A monitoring apparatus and monitoring/notifying method for receiver and sender terminals of an e-mail transmission system having a receiver terminal can confirm a status of a receiver terminal, prior to a transmission. A monitoring server monitors status of receiver terminals, such as IFAX and PC units,...http://www.google.sh/patents/US7480714?utm_source=gb-gplus-sharePatent US7480714 - Monitoring apparatus and monitoring/notifying method for receiver and sender terminals and for e-mail transmission system of receiver terminal
