Users can create their own character encodings. Email transfer scripts allow email transport from and to Mail.app through TipTop. When the deliver button is clicked in Mail.app, the outgoing message gets queued. When the GetMail script is run, all the messages stored in the remote mailbox get transferred to the local machine so that they can be read in Mail.app. This is very useful if one has a Unix account with email access, and no email access for the local NS machine.
Site licenses are available as well as academic discounts.