>The top 5 providers likely account for the overwhelming majority of all email. >Email being an open protocol allows interoperability and lowers barriers to en

>The top 5 providers likely account for the overwhelming majority of all email. >Email being an open protocol allows interoperability and lowers barriers to entry, and all of that is good, but power is still concentrated into the hands of a few players nonetheless. Power? In email? How exactly is that power exercised? What effect does 5 providers accounting for a majority of email have? As far as I can tell, it has only caused too much HTML email.