Now if someone has my phone which is receiving my e-mails At work we have a policy that smart phones are locked by a PIN. No PIN, no email. This is not ideal

Now if someone has my phone which is receiving my e-mails At work we have a policy that smart phones are locked by a PIN. No PIN, no email. This is not ideal: no mechanism to enforce 'good' PINs, force a user to change them on a regular basis.