Track an ip address by sending an e-mail

How to get IP address Just by sending an email:
First of all you need a mail tracking system for tracing the IP of a person sending you an email
www.mailtracking .com has ready set up of IP tracing.
This gives you a free account.
You can connect it with your current email account
When you send email to someone named abc@gmail.com, you simply have to add mailtracking.com to it.
As shown here: abc@gmail.com.mailtracking.com
Now when Your message is opened by the receiver, you‘ll get email to you .
It describes following things to you
1.IP address of receiver,
2.His approximate geographical location,
3.Time of opening the email
4.His browser details
5.His screen resolution
And many more details as this.
Now every time he opens your massage you’ll be notified
So finally by using this site you can simply get IP address of any person whose email address is known.
And good thing is the receiver can’t even notice that we are tracing him.