Hi all I've been looking at this problem and going through the lists for 2 days now and still haven't managed to find a solution. I've setup Squid 2.5-stable10 with Tos_Hit.patch from http://www.it-academy.bg/zph/ It compiled fine from port. Everything works fine except loging in to the hotmail, opening mailbox in yahoomail and loging in to mail.com. Using direct proxy in browser works fine. I've used acl to deny caching of the hotmail domains too. configs: http_port 3128 acl hotmail_domains dstdomain .hotmail.msn.com httpd_accel_port 80 httpd_accel_host virtual httpd_accel_with_proxy on httpd_accel_uses_host_header on header_access Accept-Encoding deny hotmail_domains bal WCCP information: Router information: Router Identifier: 10.20.30.40 Protocol Version: 1.0 Service Identifier: web-cache Number of Cache Engines: 1 Number of routers: 1 Total Packets Redirected: 152593 Redirect access-list: my-cache Total Packets Denied Redirect: 23662496 Total Packets Unassigned: 33 Group access-list: -none- Total Messages Denied to Group: 0 Total Authentication failures: 0 There is no firewall between the cache and the internet. Please help. Thanks Manoj Rajkarnikar