ZBXNEXT-1729 rejected the idea of supporting hostname lookup on the reasonable basis that implementing full support would involve userparameters, usafe params, aliases and other things.

But, automatic basic hostname lookup is the most often desired functionality and would help a large number of users without involving complicated development and feature creep in sender.

This feature request asks to support limited hostname lookup, only supporting automatic system.hostname resolution if none of the Hostname* parameters is defined.