>>> sender host name required, to match against ^ten-1\.test\.ex
>>> looking up host name for V4NET.0.0.1
>>> IP address lookup yielded "ten-1.test.ex"
+>>> ten-1.test.ex not in empty list (option unset? cannot trace name)
+>>> ten-1.test.ex not in empty list (option unset? cannot trace name)
>>> checking addresses for ten-1.test.ex
>>> V4NET.0.0.1 OK
>>> host in sender_unqualified_hosts? yes (matched "^ten-1\.test\.ex")