I was under the impression that most email marketers were well aware of the advantages of including HTML text - also known as system text - as opposed to graphical text in their messages.

Graphic elements become problematic when they are combined with typography and text, especially a unit’s name or acronym. When graphic elements begin to incorporate type, internal and external ...

or HTML. But the language – used to share text-only pages via a simple browser – was limiting. Many early web sites were basic, using vertically structured, text-heavy pages with few graphics.