After doing an 'make install' in the smail3.1.28 sources:
    1.  Comment out the smtp entry in /etc/inetd.conf if your're
        running TCP/IP.
    2.  Shut of the automatic startup of the mmdf deliver program.
        You can either 'chmod -x rc0.d/K86mmdf' or edit the file by
        putting an exit; statement at the top of the file.  I use the
        second method so that fixperm won't turn it back on.
    3.  Either add a '/usr/lib/sendmail -bd -q10m' to /etc/rd.c/7/udaemons
        (or another file in that directory), or touch /usr/lib/sendmail.cf.
        Touching the file will cause /etc/tcp to automatically start
        '/usr/lib/sendmail -bd -q1h' during startup.
    4.  If you're not running DNS/BIND, then you will have to comment
        out the inet_hosts and match-inet-addrs entries in
        /usr/local/lib/smail/routers file to prevent smail from trying
        to use the name server.
    5.  Edit /usr/local/lib/smail/config with the appropriate domain,
        smart-hosts, and smart-user entries for your system.  Make
        sure that you change the transport of your smart-user to uux
        or demand if you're not connected to the smart-user via SMTP.
    6.  Create/edit /usr/lib/aliases, /usr/lib/fullnames, and
        /usr/lib/uucp/paths appropriately for your system.  At a
        minimum, you can touch these three files which will create
        empty entries.