When I use the "Junk" button to send and email to the Junk Mail folder, it only junks that one email. If I receive another email from exactly the same sender who I already junked, the program does not automatically junk that email as well. Yes I know I can go and manually add the email address to the blocked list, but that's a hassle. Why doesn't the program do it automatically?

Operating System:Windows XP Pro
Software Version:8.0
Product Name:ZoneAlarm Extreme Security