Bloqueando msn sem bloquear o hotmail

acl msn url_regex "/etc/squid/msn"
http_access deny msn

conteúdo de /etc/squid/msn


/gateway/gateway.dll
.passport.com
messenger.msn.com
c.msn.com
.passport.com
https://loginnet.passport.com/
.gateway.messenger.live.com:443
.messenger.services.live.com:443