MikroTik

How to block all website except gmail and hotmail ?

thank you

If you would like to block all websites the easiest way may be to block access to ports.

As an example I have assumed that your LAN IP is in the 192.168.1.0/24 range. To prevent locking yourself out from access http port of mikrotik and other local devices I have specified that it should only block those ports when coming from the LAN and going to a non (!) LAN address.

Hope this helps!

It's complicated...
You could drop all IP's instead of Microsoft and Google blocks IP.
The problems is the devices will can to access YouTube, Bing, Google+, etc.

You can do something like this:
I don't know if there is something like a layer 7 for this, but i can't see another option.

Gmail will be a tricky one when using an address list as google and youtube as well as other smaller websites share IP segments with them.