I use Entourage as my email client. When I log on, it connects to my ISP server and downloads my messages fine. But recently it has started to ALSO connect several times a day to "ldap.four11.com." And once that froze my system for several minutes. I have no idea why it's doing this and am suspicious that something's wrong. I run Norton AntiVirus and it has alerted me to nothing. Any ideas??