P.S. acl_check_rcpt must contain:
require message = relay not permitted
domains = +local_domains : +relay_to_domainsDefault config does contain that. -- ## List details at https://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
