Relay on solaris sendmail

Hey everyone,
  I am running a solaris sendmail on solaris 8.  The mail relay works fine when I am inside my network.  It works fine if I hardcode an ip address in the /etc/mail/relay-domains file.  My problem is when a user wants to sendmail through the server from ouside the LAN.  They can not connect to the server.  I do not want to open it up to the entire outside world or an entire domain (i.e. if the client is at home and using earthlink, I don't want everyone that uses earthlink to be able to use the mailserver as there relay).  How can I get this to work for specific users??  Please help!!

kassidy2010Asked:
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gheistCommented:
http://www.sendmail.org/m4/readme.html
read at least 16 and 17, no need for commercial SSL keys. any synthetic will be fine. TLS to avoid passing cleartext passwords over net. example not worth more pts.
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