What is needed:
x  administration configuration
?  user configuration
x  a single menu item: e-mail (#n/#t)
x    list of e-mail
x      view individual messages
x        reply
x        reply to all
?        reply to mail list
x        forward
         save
?        move
x        mark
?        flag
x        delete
x      send new e-mail to author
x      send new e-mail to another receiver
