ELECTRONIC MAIL SOFTWARE THAT ALLOWS USERS TO SEND, RECEIVE AND FILTER ELECTRONIC MESSAGES; THE SOFTWARE INCLUDES ELECTRONIC MAIL USER AUTHENTICATION, MANAGED PROTECTION FROM UNSOLICITED ELECTRONIC MAIL AND COMPUTER VIRUSES THAT IS UPDATED WITH MINIMAL CUSTOMER INTERVENTION, AND MAY BE OFFERED AS EMAIL, WEB MAIL, IMAP, OR SOFTWARE ADD-ON TO EXISTING ELECTRONIC MAIL SOFTWARE