While surfing the web I found a great way by which you can track the emails you send.Now you can find out when your email has been read by the recipient. Now you need not to guess whether your email has been read or not. You can get a notification when your email has been opened. This facility is provided by many sites but most of them are not free.

Spypig is one of the best email tracking facility available. Best part is Spypig offers its facilities free of cost.
SpyPig is a simple email tracking system that sends you a notification email as soon as the recipient opens your email.It works with  all modern email clients such as Outlook, Yahoo Email, Gmail, Hotmail, AOL Email and many others.

All you have to do is visit there site Spypig (to visit site click here).
There you can find a Spypig farm form.
Fill your email address and other details.
After filling details click on activate my spypig option.
After that copy the image which appears in the box below activate my spypig option and paste it in your email message.
After you have copied that image , just send the email as usual.
Whenever your friend opens the email containing the spypig image, you will be notified via email that your mail has been read.

!!! amaze your friends !!!