Further, the general notion that email is predominately insecure is often wrong-

-TLS is used for most transports now.

-Email seldom transits through intermediaries (in the less connected world most had layers of smarthosts that were intermediate steps. Now almost all email is sent from origin organization directly to the destination organization, only diverging for highly secure intermediary like Erado).

I still wouldn't ever imagine emailing yourself passwords (email yourself an encrypted spreadsheet sure...to refute another comment, encryption in Office 2007+ is more than adequate) and the like, but just needed to address the hysterics about email.