>>> check domains = +relay_domains
>>> local host has lowest MX
>>> mxt1.test.ex in "@mx_any"? yes (matched "@mx_any")
>>> mxt1.test.ex in "+relay_domains"? yes (matched "+relay_domains")
>>> accept: condition test succeeded in ACL "check_recipient"
>>> check domains = +relay_domains
>>> local host has lowest MX
>>> mxt1.test.ex in "@mx_any"? yes (matched "@mx_any")
>>> mxt1.test.ex in "+relay_domains"? yes (matched "+relay_domains")
>>> accept: condition test succeeded in ACL "check_recipient"