Mail and Messaging overview

Functional overview
        The sendmail MTA
                sendmail domain tables
                sendmail mail channels
        Mail User Agents (MUAs)
        Virtual domain support
        Message store
        POP3 and IMAP4 servers
        Mail folder checking tool
        Mail processing filters

Using the Mail and Messaging system
        Sending and receiving mail in a graphical environment
        Sending and receiving mail in a character terminal environment
        Sending and receiving mail from a network client
        Extended absence (vacation) messages
        Automatic disposition (filtering) of incoming mail
        Converting mail folder formats
        Recovering damaged folders
        Using the mail configuration system