Another unintended result is that recordings sound much more as if the person knows what he is talking about. You can record a message, and specify it to be delivered at some future time. The computer will call up the addressee and tell him about the message. It can try several different numbers, and will call back later if no answer. If you go away, you can leave a forwarding number.
Users can file mail if they desire.
Messages are automatically erased from the mailbox after two weeks, if they have been read at least once. Users like this feature as it frees them from having to worry about disposing of old mail. File protection concepts are built in. Every message has an owner. You can check if someone has read the mail you sent him.