Spamhaus provides the public with free threat intelligence; helping small independent businesses, schools and non-profit organizations safely filter their email at no cost. With a global network of over 80 public mirrors, this infrastructure serves billions of free queries every day.

If you are a non-commercial entity or a small business with low query volumes and/or less than 5 users, you may qualify for a Data Query Service account with no subscription costs. To register, and for continued use of this free service, you need to meet the following criteria:

  1. These block lists are to be used ONLY for non-commercial purposes*
  2. Your email traffic totals fewer than 100,000 SMTP connections per day
  3. Your query volumes total fewer than 300,000 queries per day


* Definition: “non-commercial use” is use for any purpose other than as part or all of a product or service that is resold, or for use of which a fee is charged. For example, using our DNSBLs in a commercial spam filtering appliance that is then sold to others requires a data feed, regardless of use volume. The same is true of commercial spam filtering software and commercial spam filtering services.

A company that uses our DNSBLs solely to filter their own email qualifies as a non-commercial user and may use our free public DNSBLs if that company’s email volume and DNSBL query volume is below the free use limits. The same is true for any non-profit organization, school, religious organization, or private individual who operates their own mail server.

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