E-mail treatment method for automatic handling by a receiver of undesirable electronic mail in communications networks automatically sifts out e-mails from unauthorized senders

摘要

A sender, e.g. a personal computer (1.1), sends an e-mail (1.2) via the public Internet (1.3) with the target address of a receiver (1.7). Incoming e-mails are automatically subjected to a comparison between the sender's address and an electronically accessible list of authorized senders. Only e-mails from authorized senders are transferred into the receiver's mailbox.