Jeff Atwood
Make Your Email Hacker Proof. DO IT NOW
2-factor auth. When entering OTPs in office isn't enough... :) - 9000
minus pop3/imap and jabber clients I suppose. Looks like ahem a walled garden, someway, no? - yan
backup strategy inspired by @jwz even more fun - A. T.
pop3/imap/xmpp are all under app-specific one-timers easy to drop at any time, they are like valet keys for cars - A. T.