Hi all. My users are connected to the internet via cisco pix 515 with pix version6.3. However every morning we would have problem sending out emails from our mail clients. Only email face such problems, we have no such problems with other services like web surfing. We need to reboot the firewall to resolve the problem. Could it be a hardware problem with the firewall? Any thing that i can troubleshoot with? Thks in advance.