Issue with the host name resolving

Hello again.

The issue which I want to describe now appeared in first when I installed the OS.

When the system starts, the messages like presented below appeared in the console:

Jul 7 16:01:40 <host_name> sendmail[366]: My unqualified host name (<host_name>) unknown; sleeping for retry
Jul 7 16:02:40 <host_name>sendmail[366]: unable to qualify my own domain name (<host_name>) -- using short name
Jul 7 16:02:42 <host_name>sm-mta[421]: My unqualified host name (<host_name>) unknown; sleeping for retry
Jul 7 16:03:42 <host_name>sm-mta[421]: unable to qualify my own domain name (<host_name>) -- using short name
Jul 7 16:03:42 <host_name>sm-msp-queue[425]: My unqualified host name (<host_name>) unknown; sleeping for retry
Jul 7 16:04:43 <host_name>sm-msp-queue[425]: unable to qualify my own domain name (firma123) -- using short name

I never met this before, therefore I googled it and found the solutions:

1. If you do not plan to use sendmail, you can disable it.
   Add sendmail_enabled="NONE" to your /etc/rc.conf file.
2. The other way to specify any domain within /etc/hosts. My configuration is:
   

   192.168.2.11 ltr
   192.168.2.11 ltr.my.com
   

As a result, there is no delay on the system start anymore.

Have a nice day!

P.S. Thanks these guys for the answer.