I work for a UK Towage company which operates a fleet of Tugs around the world. Our vessels are all installed with Outlook which allows the Master to send and receive emails via Iridium Satellite. Due to confidential information sometimes sent between the vessels and the office we do not allow crew members access to email. We would really like to change this and I was wondering whether there was any email software that somehow allows users to set up password protected areas so only they can view their emails. Unfortunately the vessels do not have access to the internet so setting up a Hotmail or Yahoo account is not an option.