unwanted morphing image in email

Have an email form that a company forces everyone to use. It has a morphing image in it. I suspect the form has site links of some type which may be creating unnecessary network traffic.
I do not know HTML (nor do I have the time to learn it) to know where, in the source, to find the image and I cannot see any links.
Any pointers on where to start? My main objective is getting them to kill the morphing image if my network traffic suspicions are true.

 

Not sure about image morphing, it could be an animated GIF or something with javascript, just look for the image name, something like jpg or gif for starts to find the code.