An electronic mail computer program running as a client application permits a user to determine in a single user interface application window, for example an “in-box,” the on-line status of those persons who have sent e-mail messages to the user. Once such a sender has been identified as being currently...http://www.google.de/patents/US20050091329?utm_source=gb-gplus-sharePatent US20050091329 - Messaging system for indicating status of a sender of electronic mail and method and computer program product therefor
