[Rspamd-Users] [Spamhaus notice] Service update for users of Spamhaus Project's DNSBLs who query via Cloudflare DNS

[Riccardo Alfieri]

Hello,

If you currently use The Spamhaus Project's free DNSBLs and make queries 
via Cloudflare DNS resolvers, you need to change your configuration. 
This will ensure you don't have any interruption to your service.

As of Tue, February 15th, the Project will begin restricting access to 
its blocklists for those querying via Cloudflare DNS.

Why? The Spamhaus Project's Terms of Use 
(https://www.spamhaus.org/organization/dnsblusage/) outline that it 
doesn't allow users to query via DNS resolvers where there is no 
attributable reverse DNS; this includes Cloudflare.

This is to protect the free service for those it's intended for, i.e., 
non-commercial low-volume users. Some organizations try to hide behind 
unattributable DNS and make queries outside the Fair Use Principles, 
reducing the quality of the service for everyone.

To keep being protected by free DNSBLs and avoid issues with your email 
stream, we recommend that Cloudflare users start accessing the 
blocklists via the free Data Query Service (DQS), which you can sign up 
for here: 
https://www.spamhaus.com/free-trial/sign-up-for-a-free-data-query-service-account/

Changing your configuration should only take a matter of minutes. Once 
you've signed up and verified your email address, you will get access to 
a "DQS key" to include in your configuration. These config changes take 
only minutes; see our technical docs 
(https://docs.spamhaus.com/datasets/docs/source/40-real-world-usage/index.html) 
for more detail.

To provide a clear signal to users that the Project's DNSBLs are not 
protecting their email, Spamhaus will return an error code; 
127.255.255.254. If you haven't set up your email servers to accept this 
error code, all emails could be rejected and returned to their sender.

To ensure you continue being protected, for free, with our IP and domain 
DNSBLs, please move to the DQS.

If you have any questions regarding these changes, please use the 
contact form here: https://www.spamhaus.com/#contact-form

-- 
Best regards,
Riccardo Alfieri

Spamhaus Technology
https://www.spamhaustech.com/