Once you send an email to someone, you have no idea if they actually opened it and read it, until they actually reply to you.
But that is just how Email works, it works different than other messaging services.
So in this video, we’ll see if we can actually know when someone opens your email on their end.
We’ll make use of the HTML rendering feature of Gmail to embed an image in the mail and monitor the requests for that image to be able to tell when your email is opened, it’s an awesome hack!
There are some extensions available on the web store that does this automatically, but you can build your own based on this idea!
For this demonstration, I just used the python http server along with ngrok to make it work. But as I said you can build anything out of this idea.
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