I have just setup our company e-mail with a popular online e-mail provider. E-mails will be retrieved from the online server via Thunderbird installed on Windows 7 PC's. I wish to exercise administrative control such that Thunderbird will only connect to the particular account with the particular online e-mail provider I originally set it up with.
Which is to say, I want to prevent users from accessing their personal e-mail (e.g. Gmail, Yahoo, Hotmail, etc.) by simply creating new accounts on Thunderbird.
Is this possible? How to do it? Users are currently non-admin users with program access restrictions enforced via parental controls.