Really easy one: The first email with a decent search, and a philosophy that with good search folders are redundant. Also a help: A generous free allowance and

Really easy one: The first email with a decent search, and a philosophy that with good search folders are redundant. Also a help: A generous free allowance and snappy clean interface at the time (2004?) plus the old waitlist invite only trick for fake scarcity. This was in the MSN / Yahoo bloaty web heydey too.