If you are installing Messaging Server for the first time or upgrading from an earlier version of Messaging Server, ensure that you have the following entry in /etc/hosts file on your Solaris system:
<ip-of system> <FQHN> <hostname>
For Example, 18.104.22.168 budgie.siroe.varrius.com budgie
On Solaris 10 platforms, you not only have to add the Fully Qualified Domain Name (FQDN) to the /etc/hosts file, but also to the /etc/inet/ipnodes file. Otherwise, you will get an error indicating that your host name is not a Fully Qualified Domain Name.