7 months inactivity limit for a free account is a very reasonable time
I fear that I, as a rookie, would struggle in understanding how to indicate which mails should be sent encrypted and which should be sent unencrypted. A lot of my friends and family use Gmail, Yahoo or Hotmail, and don't have the knowledge how encryption works. So it'd depend on me then, but I too struggle in understanding how to indicate whether an email should be sent unencrypted or encrypted ...
For how long can one see the date(s) of previous sign-in(s)?