A good candidate for a mail gateway is a system that is attached to Ethernet and phone lines. Another good candidate is a system that is configured as a router to the Internet. You can configure the mail host or another system as the mail gateway. You might choose to configure more than one mail gateway for your domain. If you have UNIX-to-UNIX Copy Program (UUCP) connections, you should configure the system (or systems) with UUCP connections as the mail gateway.
For more information, see Using Your Assigned Administrative Rights in Securing Users and Processes in Oracle Solaris 11.2 .
# svcadm disable -t network/smtp:sendmail
# /usr/sbin/check-hostname hostname phoenix OK: fully qualified as phoenix.example.com
If this script is not successful in identifying the fully qualified host name, you need to add the fully qualified host name as the first alias for the host in /etc/hosts. If you need help with this step, refer to Step 4 of How to Set Up a Mail Host.
For more information, refer to the ypwhich(1) man page.
# nslookup hostname
Use your host name.
For more information, refer to the nslookup(1M) man page.
For more information, refer to the ldaplist(1) man page.
# svcadm enable network/smtp:sendmail
See How to Test the Mail Configuration for instructions.