-xx@not.exist is undeliverable:
- Unrouteable address
-ff@mxt1.test.ex is undeliverable:
- lowest numbered MX record points to local host
-fff@mxt1.test.ex is undeliverable:
- lookup of host "fff" failed in fail router
+xx@not.exist is undeliverable: Unrouteable address
+ff@mxt1.test.ex is undeliverable: lowest numbered MX record points to local host
+fff@mxt1.test.ex is undeliverable: lookup of host "fff" failed in fail router