Third party 1x1px image tracking pixel tool for html coded email
I am stuck with how to and where to create an impression tracking url for coded html emails.
This is possible since I got two separate URLs, one for impression and another for click tag tracking (provided by the client). So it means this is possible.
But while trying, I am unable to find any platform to test it or create my own separate links for another client.
Please guide through from where can I generate the impression & click tracking link and also how to test it.