# Exim test configuration 0490 .include DIR/aux-var/std_conf_prefix primary_hostname = myhost.test.ex # ----- Main settings ----- acl_smtp_rcpt = accept acl_smtp_data = a1 queue_only # ----- ACL ----- begin acl a1: deny message = body contains $body_zerocount binary zero characters condition = $body_zerocount accept # End