> I started reading the excellent tips from the Exim Wiki (Thanks to those > who contribute), I just implemented the "HELO is an IP Address", but I
> think I placed it in the wrong ACL (acl_check_rcpt).
AFAIK some smtp-daemons coudn't understand reject after helo and will try to
deliver message again and again(is there some RFC about it?). But reject
after RCPT TO: will be correctly interpreted. So it's right acl.