could be personalized. 2003 (6.x) Version 2003 was announced September 16, 2002. This version added Norton Spam Alert to reduce spam. The filter scanned the whole message and its context, rather than looking for keywords. A POP3 client had to be used. When a message was identified as spam, Norton inserted a phrase, by default "Spam Alert:", in the subject line. Users could create a rule to delete or move flagged messages. Users could create strings of text for Spam Alert screen when classifying messages. In PC Magazine testing, Spam Alert mistakenly classified 2.8 percent of legitimate e-mail as spam. 47 percent of spam slipped past the filter. Although false positive rate was low, the feature did not fare well at finding actual spam. The updated main interface offered green and red indicators to show which features were active and which needed attention. The firewall updated features. A Block Traffic button in the main interface blocks all incoming and outgoing Internet traffic from an URL. Another new feature, Visual Tracker, graphically mapped attacks to their origin. The firewall blocked all port scans conducted by CNET, stealthing each one. Following the Nimda and Code Red worms, this version scanned all incoming and outgoing traffic for suspicious data exchanges against a routinely updated database, a feature ported from Norton Internet Security 2002 Professional Edition. Connection to the offending computer was automatically severed if the traffic matches a database item. Symantec announced a Professional Edition on November 19, 2002. Data recovery tools allow users to recover deleted or malware-damaged files. The inclusion of a data erasure tool allowed users to delete files while minimizing the chance of recovery. Web Cleanup removes browser cache files, history, and cookies. To maintain dial-up connections, Connection Keep Alive simulates online activity during periods of user inactivity. Norton Productivity Control enables users to filter Internet content and block newsgroups. When used with User Access Manager, multiple filtering profiles could be created, assigned to different users. 2004 (7.x) Announced September 8, 2003, version 2004 adds adware, spyware, and keylogger protection. PC Magazine found the added protection to be weak. Out of the spyware samples Norton detected, a significant number were not removed completely, requiring manual removal. Norton did little to prevent spyware infections. Norton AntiSpam, the renamed spam filtering feature, has a set of spam rules, which cannot be viewed or edited. Whitelists and blacklists of senders could be