If the Resolve the address of the sending device option is also checked, this option will remove the trailing domain name from the resolved host name. In this case, instead of "sales-router.company.com" you will see just "sales-router".
Enabling this option is useful when you only receive messages from a single domain or to reduce the amount of space used by the host name in the scrolling display.
This option also effects the host name field used for all the logging actions.