ORDB is now configured to return each IP as spam source
From nixCraft Linux Sysadmin Blog
ORDB is now configured to return each IP as spam source
ORDB was a database of open relay email servers, provided until 2background-color: #b7c3cf; -moz-border-radius: 10px; min-height: 20px; width: 575px; font-weight: normal; padding: 15px 15px 15px 15px;background-color: #b7c3cf; -moz-border-radius: 10px; min-height: 20px; width: 575px; font-weight: normal; padding: 15px 15px 15px 15px;6 as a voluntary service to block spam. Now ORDB.org service has been re-activated and it is returning every IP address queried as being on its blacklist. I guess this was done to punish lazy sys admin / mail administrators 
If you or your mail server / gateway / firewall querying relays.ordb.org; please stop it immediately. If you query relays.ordb.org - mail server will rejecting all incoming mails from that server.
Symantec Mail Security for MS-Exchange Server - Spam Filter
Symantec Mail Security for Microsoft Exchange configuration in the list of Anti-spam blacklist servers including relays.ordb.org. Immediately remove the entry.
Remove ORDB.ORG from MS-Exchange Server Spam Filter
In Exchange Server 2background-color: #b7c3cf; -moz-border-radius: 10px; min-height: 20px; width: 575px; font-weight: normal; padding: 15px 15px 15px 15px;background-color: #b7c3cf; -moz-border-radius: 10px; min-height: 20px; width: 575px; font-weight: normal; padding: 15px 15px 15px 15px;3 you can find the feature for blacklist support within the global settings of your organization. Visit MS-Exchange System Manager > Global Settings > Message Delivery Properties -> Connection Filtering tab > Remove relays.ordb.org
Remove Linux / UNIX - Postfix Mail Server - Spam Filter
Open postfix configuration file and remove the following line:
reject_rbl_client relays.ordb.org,
Restart postfix mail server:
# service postfix restart
