Disabling reverse-IP lookup for mail relay

I have several machines on a DSL circuit and I use a Suse 7.0 box as my mail server. The problem is that if I configure my other machines (one of which is a Ultra 10 running Solaris 2.7) to use the SuSe box as a smarthost, the relay is rejected. The reverse IP lookup is failing since the IP belongs to Pacbell. I can pay Pac Bell $100/domain to give me this but I have 4 domains and there is know way in hell I am going to pay that. Can I configure sendmail to ignore the reverse-IP lookup? I have the only valid relays defined in /etc/mail/access Thanks, CC