Using Feedburner, you are able to instantly have an email subscription service for your blog. Every day that you post something new in the blog, an email is sent out to the people who have subscribed to your blog. You don't have to do anything. People join the list and leave the list of their own free will; again, You don't have to do anything. You can make some choice about the way the email is configured, but Feedburner does all the work of actually maintaining the list and sending out the email.
1. Login to your Feedburner account.
2. Click on the Feed Title.
3. Click on Publicize Tab.
4.Now Click on Email Subscriptions.
5.Now Click on "Activate" Button.
6.Now Choose the Blogging Platform as "Blogger"
7.Then you will get code . Copy and paste the code in your blog where ever you like to add Feed Burner Email Subscriptions Form.