Track my sent emails

Sazerac7

Distinguished
Jun 10, 2012
16
0
18,510
I apologize if I'm in the wrong place, please direct me.
My question is there are a lot of tracking tools out there. Which tool would you recommend to track my emails. I'm running Win-7pro SP1 with Google Chrome using GMAIL.
The only information I need from a tracker is when was my email opened.
My system is Dell,AMD Athlon, 64 x 2 Dual Core. Thanks, Richard