Get in touch with the list maintainer directly (for most blocklists this means creating an issue on the github repository of the list). We try to not interfere with third-party lists and deliver them to you as-is, most of the time the maintainers have valid reasons to block or not block a specific domain, and if it's a mistake it's better fixed upstream anyway.
Note: if this is about the NextDNS Recommended Ads & Trackers Blocklist, then please create an issue on this repository.
Same as above.
Create an issue (or even better, a PR) on this repository.
Create an issue (or PR) on this repository. If a domain needs to be added, please detail the steps you made to get this domain queried.
Talk to us via the chat available on https://nextdns.io so we can figure it out and fix it.
We highly recommend creating a post on our subreddit /r/nextdns to get more visibility (and so that other less tech-savvy users can join the discussion as well).