An electronic mail transmitting and receiving system that is capable of predicting whether or not the user can access the electronic mail transmitting and receiving system, and which is also capable of automatically controlling whether or not the electronic mail addressed to the user is transferred to...http://www.google.com.au/patents/US6460073?utm_source=gb-gplus-sharePatent US6460073 - Method and apparatus for transmitting and receiving electronic mail based upon user availability
