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FREE DNSBL Services


Use of the nsZones DNSBLs is free of charge for everybody. You can use nsZones public mirrors free by setting your mail server's DNSBL feature to query bl.nszones.com


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Professional DNSBL


Synchonize option is available for internet ISPs, organizations, networks, hosting providers, email providers.


Get Support 24x7

  • Quality of Service
  • Technical Support
  • High Performance
  • Reliability
  • Scalability

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Free DNSBL Services
The use of the nsZones DNSBLs is free of charge for everybody. Depending on how much email traffic you have, you can either use nsZones public mirrors free, by setting your mail server's DNSBL feature to query bl.nszones.com, or synchronize our databases localy in your servers.

For professional use, internet ISPs, organizations, networks, hosting providers, email providers, or commercial spam filter providers, is better and faster to synchonize the lists you need with RSYNC.

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Public Mirror DNSBL Servers

We are always need boxes at different locations to help us provide our services.
Anybody can host a nsZones.com public mirror.
You can use your Windows, Linux or Unix dedicated or VPS server.
We will give you access to our databases and you will setup your DNSBL for public use.
We will provide you the software, help and support to setup your DNSBL server.
You do not have to give us any access to your server.
You will manage and setup your server by your own.

If you want to host a public mirror, please contact us to service@nsZones.com.

Please donate to the Project.

nsZones spends a lot of time and money keeping this project running and offers a first class service free of charge to you.

If you are satisfied with our service, and you want the blacklists stay free for all users, we would be glad to receive a small or a big donation from you.

All money donated to the project will be invested in new mirrors and increasing bandwidth so you will also benefit from better performance.


You can donate any amount you want with Paypal.

Smallest amounts can help to keep our blacklists free for all!