>>> r1 router declined for x@mxt2.test.ex
>>> no more routers
>>> ----------- end verify ------------
+>>> message: >$acl_verify_message< ++++
>>> defer: condition test succeeded in ACL "check_rcpt"
+>>> end of ACL "check_rcpt": DEFER
LOG: H=(a.b.c.d) [1.2.3.4] F=<> temporarily rejected RCPT <x@mxt2.test.ex>: all relevant MX records point to non-existent hosts