How ironic that you sent that message from an MSN account. :-) Basically, good luck. I would block the standard mail ports, then use a content filter to block the html-based email sites. But you'd have to do them manually for each and every site. It's not practical and it's a lot of work. And you'll never block it all. Ever. What exactly, if you don't mind me asking, would you do this for? Tim Rainier Information Services, Kalsec, INC trainier@xxxxxxxxxx "azeem ahmad" <azeem81@xxxxxxx> 11/01/2005 08:41 AM To squid-users@xxxxxxxxxxxxxxx cc Subject email hi list i want to block my users from any kind of email. is it possible. bcuz if i block smtp/pop3 then there are so many web based mail servers like msn/yahoo. and if i block http then it means i have blocked everything on my network. i like to block every kind of email plz tell me how can i do that. Regards Azeem _________________________________________________________________ Don't just search. Find. Check out the new MSN Search! http://search.msn.com/