Then why does Quick Books 2020 put this (what tracker?) at the end of every email message that accompanies a sent invoice?

img src="qbdtemailnotifications api intuit.com v1 tracking notification" width="1" height="1"

This is partially stripped to allow me to post - YOUR TECH CHAT WOULDN'T Let me send an image of this either!! USELESS SUPPORT

This is triggering spam detectors all over