Need help with Suse 8.2 and mail connection refused

I'm replacing an old Redhat box with a new Suse 8.2 server using procmail. I can send mail from the root account if I manually set the domain name in Pine but I can't send mail from any internal workstations. I can telnet to the server port 25 from inside but not from outside. What step am I missing? -- (o< |) //\ Powered by SuSE Linux /\obt. V_/_ Virusproof, Crashproof /\/\iller 3:11pm up 34 days, 19:14, 25 users, load average: 1.44, 1.41, 1.37 processes 1068100