[unsupp0rted]

People need very large red "click here" call-to-action buttons to click inside emails. With plain text email you can't have those. Also people need a sampling of your latest blog posts in a table inside all your emails, with a stock photo in the left column and the article title and snippet in the right column.

[lionkor]

Not sure if sarcasm, but I really never got any value from anything like that.

[donohoe]

It’s must be, because it’s provably incorrect. I say this from actual experience.