Image tracking not working with Google Analytics

I'm trying to add Google Analytics to my newsletters - sending via email.

I found img tag logging ( <img src="https://www.google-analytics.com/collect?v=1&utmac=UA-123456789-1&ec=email&ea=open&t=event" /> - https://blog.mailtrap.io/google-analytics-for-emails/ ), but it's not working because of src link is replaced by mail engines (gmail, ymail,..).

Also, I tried to track it by opening on my own web-site: I added img tag on my web-site's main page and loaded many times, but Google Analytics did not report it (logging is working on my Google Analytics account: I've tried to add Google Analytics scripts in head and it was logged - function gtag and its scripts..).

How to use Google Analytics in mails?

Thanks