Email Watcher is an e-mail notification program that can check an unlimited number of POP3 email accounts. Events and filters can be applied to the incoming mail to play a wave file, Popup a message screen or delete the incoming mail. Email Watcher is an e-mail notification program that can check an unlimited number of POP3 email accounts. Events and filters can be applied to the incoming mail to play a wave file, Popup a message screen or delete the incoming mail.Events can be applied to individual accounts, all accounts or to a specific incoming message based on the criteria you select. Delete events are especially useful for deleting junk mail or potential viruses.