Tracking E-mail very simple
Sign up on Shivalink.com Mail Tracker App here
It will send you activation link in mail just click on that. And login in app and Generate html by entering mail subject.
Install the below given extention in chrome browser
Now create new html and add the previously created html from Shivalink Mail App.
Goto gmail and compose new email, now when you click the body you will see 'G' like icon name Gorgias, just click on that and insert the template. Now Write your mail and click send.
Now your mate read your mail you will get the mail with time, to look ip you can login to Shivalink Mail App.
Also there is little hack in it. you can just send the image src path to your mate and when he clicks on it you will receive the mail and also you can see his ip in Shivalink mail App.