3.9 I have users on my local LAN who need to use my box as their MTA. When they send mail from their client software it bounces. How do I fix this?

In /etc/mail/access add the IP addresses for all of the client machines with the word RELAY just like we did in question 3.8 above. Then issue the command makemap hash /etc/mail/access.db < /etc/mail/access, restart sendmail and try your tests again.