# Rspamd fuzzy feed, DNSBL and site usage policies

If you use Rspamd fuzzy feeds and/or Rspamd URLs/Emails black lists then you need to understand the existing limits and whether you are qualifying for the free usage terms.

We cover here fuzzy storage feeds, DNS lists (specifically URLs and Emails black lists) and rspamd.com site usage for maps distribution. In future that could be extended to other intelligence resources provided by rspamd.com.

## Free usage policy

We provide infrastructure to collect spam messages data and algorithms to convert spam waves to a usable set of blocked fuzzy hashes, urls and emails. All these operations require both hardware and human resources. Hence, we define fair usage policies to use these services.

To qualify for free usage of the feeds you must satisfy the following conditions:

1. Your use of the data is non-commercial

and

2. Your query volume is less than 500,000 queries per day

## Vendors policies

Rspamd maps check are typically running quietly in the background. When servers are chosen they will typically remain in the configuration “forever”. If the client traffic causes trouble for the server it is extremely difficult to mitigate if not carefully planned for in advance.

For example, there was an incident that caused troubles for both Rspamd project and the vendor’s users.

Hence, we are kindly asking to contact us before embedding Rspamd in any sort of commercial or open source project. In this way, we could decide about the strategy to avoid issues with the embedded solution in future.

This service also includes rsync based access to URLs and Emails feeds so you can use your own rbldnsd to serve this data with no delays to your email scanners.