Earlier quoted context omitted.
You say that like Gmail is the market leader here, they're not. Most of the features you mentioned do exist in other services and other services do have features that Gmail doesn't. The OP can definitely make a business out of email, it is far from a solved problem.
> You say that like Gmail is the market leader here, they're not. They are as far as I'm concerned. I'm curious, though, who you do consider to be the market leader? I'm going to have a hard time keeping my composure if you say Hotmail (or "Live" mail), Yahoo, or something similar.
Never the less, my original point was that all of these Gmail strengths that you think are very important are obviously not very important to people using Yahoo or their ISP webmail. The idea that everyone uses Gmail and any competitor must compete feature-by-feature is just incorrect.