--- /dev/null
+xx@mxt6.test.ex
+ router = lookuphost, transport = remote_smtp
+ host ten-1.test.ex [V4NET.0.0.1] MX=5
+myhost.test.ex@mxt1.test.ex
+ router = self, transport = remote_smtp
+ host myhost.test.ex [V4NET.10.10.10]
+xx@mxt1.test.ex
+ router = self2, transport = remote_smtp
+ host myhost.test.ex [V4NET.10.10.10]
+xx@not.exist is undeliverable:
+ Unrouteable address