SpamRats Subscription Service

SpamRats! first became a public RBL back in 2007, and we never expected how successful it would become. We just wanted to share what we were seeing and doing with the general public. But since then, we have spent countless man hours, time and money to develop this reputation list and its data and distribution. And unfortunately, we finally have to implement some restrictions to its use.
It is too bad a few bad apples have abused access to this data, and/or are taking advantage of its open access.


First of all, this doesn't apply to everyone. We are committed to sharing and helping make the world a better place. If you are one of the following please continue using this information for free but we do suggest you let us know if you are performing high volume queries, and please acknowledge where the data is coming from:

  • Non-Profit Organizations
  • University Email Servers
  • Small ISP's and Email Operators ( eg < 5000 mailboxes )
  • Special Research Projects ( contact us )

However, if you are a large scale ISP or you are selling or providing spam protection as part of a commercial offering you should be contributing to this effort and helping pay the expenses of gathering this data for you. And under NO circumstance should you be claiming this data as yours, without the express permission of SpamRats!

Subscription Fees

We have decided to keep it simple. If you are a high volume ISP, we ask that you simply pay $.01 per mailbox per quarter/yr that you are protecting. It isn't a lot. For an ISP of 100,000 subscribers that would only amount to $1000/quarter or $4000 per year, and we are pretty sure that is lot less than you pay your other providers.

However, if you are a spam protection or security company and you are making money from providing the protection offered by SpamRats! we ask you enter into a data licensing agreement, and you will have to contact us for pricing for your business model.

Also, please remember that you will NOT be able to use public DNS servers to query our data. You will need your own DNS servers in place, so that we can allow you access. An added benefit of a subscription, is that we can help you with advanced technology that will allow non-DNS queries directly from our data information. And with a subscription, you get access to ALL of our SpamRats! lists, including RATS-NOPTR, RATS-SPAM, RATS-DYNA, and RATS-AUTH.


Use this form ONLY for subscription requests, (or to let us know that you are querying our data), all other requests should use our normal Contact form. We can only respond during normal business hours Monday-Friday, Pacific Standard Time.

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Partnering and Business Development

We normally will respond to your request within one (1) business day. And we are always open to working with other parties so if you have a special request for a business or partnership relationship, please provide a full description in order for us to direct it to the correct internal party.