I am trying to debug the markup of my email templates. I created an html template with NO colors specified (font or background), in order to respect user defaults and especially respect dark mode. This works as expected when I send an email that contains only text. However when I add an image to the content of the message, suddenly dark mode is not respected and it appears that there are colors being defined (black text on white background). Can anyone help me out with this? I don't want any extra style definitions to be added to my emails just because I added a photo.