Try this unblocker!

It's new and nobody knows about it yet:
http://tiredstudents.com/

It looks like a lot of school administrator type people have been watching our sources, and are blocking new unblockers pretty much as soon as they're released. So all the unblockers we've posted on this site are probably blocked and any new ones we post from that same source will be blocked very quickly as well. For this reason it'd be best if you try to make your own unblocker instead - you can find instructions on how to do this here: How To Make A Proxy

How you can access Yahoo Mail in school - Week 09, March 2010

We post a bunch of unblocking sites approximately every week, so sign up for our feed to stay updated!

The best way of getting on Yahoo Mail at school is by using an unblocker. You can get to any blocked site with an unblocker.

How do unblockers work?

An unblocker is like a gateway that pass information between the computer you're on and the site you want to go to. The unblocker accesses the site you want in your place, accesses the page, and forwards it to you. So the site you want to be on never sees your IP. So, basically you are surfing sites indirectly. School firewalls only think you are visiting the unblocker, not the destination site.

An alternative way to unblock Yahoo Mail at school is to set up your own unblocker tool. This is more complicated than using an unblocker but it pays off because you're in control. How to do this is too much effort to explain here, but you can find a guide here: Unblock Yahoo Mail from school. You can even make money from your unblocker through advertising.

Here are some unblockers you can use to unblock Yahoo Mail:
www.leapnow.info
www.phpbido.net
orob.info
ezunrestricted.com
dowza.info