-- Your diagnosis --
 IP Address:211.10.19.38
 RemoteHost:
-- %ENV --
 HTTP_CACHE_CONTROL : no-cache, max-age=259200
 HTTP_CONNECTION : keep-alive
 HTTP_USER_AGENT : Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0) Opera 7.23 [ja]
 REMOTE_ADDR : 211.10.19.38
 REMOTE_PORT : 6480
-- DSBL --
 211.10.19.38 -> Listed(-_-)
-- BBQ --
 211.10.19.38 -> Roasted(-_-)
-- BBX(Unrelated to the proxies.) --
 211.10.19.38 -> None(^-^)
-- Tor(an anonymizing overlay network for TCP) --
 211.10.19.38 -> None(^-^)
-- PORT CHECKING --
 PORT 80: Result:refuse
 PORT 1080: Result:refuse
 PORT 3128: Result:refuse
 PORT 8000: Result:refuse
 PORT 8080: Result:refuse
 PORT 8888: Result:refuse

…だったので、解除申請をしようとしました。
ところが、IPを入力してRequest Removalをクリックしても
「プロバイダのアドレスのあるページ」が表示されません。 
かわりに、

DSBL: Removal Results
Please choose an email address to send the removal confirmation to (if none of these addresses are acceptable, please READ THE ENTIRE PAGE before emailing DSBL):
No removal addresses available. Please configure reverse DNS for this host to be able to remove it. See http://www.dnsstuff.com/tools/ptr.ch?ip=211.10.19.38 for more information.

Please test the email address chosen before requesting removal using this page. If the removal confirmation is lost or deleted you will need to wait 1 week before requesting removal again. There are NO EXCEPTIONS to this rule.
Note that postmaster@ is a required address, see RFC 2821, section 4.5.1.
You can change the list of options above by changing reverse DNS. See http://www.dnsstuff.com/tools/ptr.ch?ip=211.10.19.38 for more information on reverse DNS
DO NOT EMAIL US TO REQUEST THAT WE SEND TO OTHER ADDRESSES; we will not do so.

以上のような文面が表示されます。
どうすればよいのでしょうか?