Tired of your office or school officials blocking Gmail? In today’s How To section, we give you a sure shot, step by step guide on How to unblock Gmail.
The whole idea began when Google decided to give Gmail as an addon in iGoogle. When you add the Gmail gadget to igoogle, all your mails are routed through the igoogle address (google.com) instead of gmail.com, thereby defeating all filters that block gmail.com domain. So unless your office/school have blocked google.com, this method should work for you.
Here is what you should do:
Currently, the iGoogle Gmail gadget provides options to read, compose and archieve your mails, but Labels are not supported.

1. Sign in to iGoogle with your Google account.
2. Signup for iGoogle Sandbox.
   The new version of iGoogle which supports Gmail is offered only in iGoogle sandbox, which is aimed at developers testing out the new iGoogle gadgets. However, you too can use it by signing up here.
   Enter your First Name, Last Name and email address and hit Submit. You’ll be taken to the new iGoogle page.
3. Add the Gmail gadget.
   
   Click on Add Stuff on top right hand corner of the screen and add the Gmail Gadget.
4. There is no fourth step. You’re done.
   If everything went correct, your Gmail inbox will be seen on the iGoogle home page. Click on any email to open it in full screen.