Recently in DNSBL Category

We have been contacted by several clients who are having issues sending and receiving emails to various ISPs and companies.

We at Blacknight ARE NOT using ORDB as it is defunct, however it is obvious that quite a few people still are. We cannot assist you, as the mail servers affected are not under our control.

If you have issues sending mails please check the error message. If there is a reference to ORDB you will need to contact the person / company you are sending the mail to.

Some of you might remember relays.ordb.org going offline a couple of years ago. It was one of the widely used, free, DNS Blacklists.

Yesterday at some point they started them backup and they appear to have blacklisted every single IP address.

Our monitoring system checks all configured IPs on all nodes against blacklists of this kind and sends you a notification via email or sms if one of your IPs gets on a list.

Please ignore these, but check all your mail servers to make sure they are not blocking based on "relays.ordb.org".