No subject

...
    o Sendmail -- By default, sendmail does not accept network connections
      from any host other than the local computer.  If you want to
      configure sendmail as a server for other clients, please edit
      /etc/mail/sendmail.mc and change DAEMON_OPTIONS to also listen on
      network devices, or comment out this option all together.  You will
      need to regenerate /etc/sendmail.cf by running:

            m4 /etc/mail/sendmail.mc > /etc/sendmail.cf

      Note that you must have the sendmail-cf package installed for this to
      work.
...

kevin