x@y.z failed to verify: unrouteable mail domain "y.z"
x@smart.domain
  router = smart1, transport = unset
x@test.ex
  router = smart2, transport = dummy
x@myhost.test.ex failed to verify: Unrouteable address
x@y.z failed to verify: unrouteable mail domain "y.z"
x@smart.domain failed to verify: unrouteable mail domain "smart.domain"
x@test.ex failed to verify: Unrouteable address
x@myhost.test.ex failed to verify: Unrouteable address