Log in as root to the Sun N1 System Manager management server.
Verify that the /etc/hosts file has entries for loopback and the management server.
Make certain that either of the following loopback entries is in the /etc/hosts file.
127.0.0.1 localhost.localdomain localhost
Make certain that an entry exists for the management server and its IP address. For example:
220.127.116.11 n1mgmt.domain n1mgmt.domain
where 18.104.22.168 is the IP address of the management server, and n1mgmt is the name of the management server and domain is your company domain name.
Your /etc/hosts should be similar to the following example:
127.0.0.1 localhost.localdomain localhost 10.5.157.123 n1mgmt.company.com
Save and close /etc/hosts.
Reboot the N1 System Manager management server.
Configure the management server mail service as described in Configuring the Management Server Mail Service and Account.