sendmail howto for Redhat Don't use linuxconf to setup sendmail anymore. It will open up sendmail for spam attacks. Instead go to the /etc/mail/ directory in the access file add you local ip addresses Example 192.168.2 RELAY would allow anyone from the 192.168.2.xxx subnet to send e-mail The local-host-names file should have you domain name. Example coolwebsites.org once the changes have been made type make to rebuild the databases Recap vi access add local subnet vi local-host-names add domain name make if make says that it did nothing then make clean this removes all of the .db files. make Now restart sendmail and test. use the sendmail stop command a few times until it says fail The script doesn't kill all of the processes as it should /etc/rc.d/init.d/sendmail stop /etc/rc.d/init.d/sendmail stop /etc/rc.d/init.d/sendmail start use linuxconf Service Control Activity sendmail and check Automatic and levels 2 through 5 so sendmail automatically starts on reboots.