When you have all of the systems in your mail configuration set up, use the suggestions in this section to test the setup to make sure mail messages can be sent and received.
Become superuser on the system for which you have changed a configuration file.
Type pkill -HUP /usr/lib/sendmail and press Return.
sendmail is restarted.
Send test messages from each system by typing /usr/lib/sendmail -v names </dev/null and press Return.
Specify a recipient's e-mail address in place of the names variable. This command sends a ...