--------> r1 router <--------
local_part=unknown domain=recurse.test.ex
checking domains
+recurse.test.ex in domains? yes (end of list)
calling r1 router
r1 router called for unknown@recurse.test.ex
domain = recurse.test.ex
--------> r1 router <--------
local_part=unknown domain=recurse.test.ex.test.ex
checking domains
+recurse.test.ex.test.ex in domains? yes (end of list)
calling r1 router
r1 router called for unknown@recurse.test.ex.test.ex
domain = recurse.test.ex.test.ex