However, according to Van der Grift, the system is still secure with Norton Auto-Protect enabled.

CNN: Norton AntiVirus puts a lock on e-mail

Van der Grift has no information on programs causing conflicts with Poproxy, but said there has been another cause blocking access to e-mail: unknowing users incorrectly disable the Poproxy program because they don't trust it.

CNN: Norton AntiVirus puts a lock on e-mail

"Overcautious customers tend to disable Poproxy manually in the Task Manager (accessed by hitting Control-Alt-Delete in Windows), others get weary of the program and decide to block it when their personal firewall reports that Poproxy is trying to connect to the Internet, " said Van der Grift.

CNN: Norton AntiVirus puts a lock on e-mail