Is there such an email tracker?

Question

Email

and again a question about email tracking. I googled and poked around, but couldn't find a clear answer.
I need a tool that can create a line of email tracking code that I can insert into my html email. The service sees the opening of the letter and sends me an email.

Answer 1

Every time the same thing.
I know a hundred thousand and one way to make this "tracker" track when not necessary, and not track when necessary :)