Step by step
- Capture the evidence before anything else. Screenshot the coomer.su page with the URL bar visible, save the full link, and note the date. A notice filed after the page changes is much harder to support, and evidence gathered afterwards is worth less.
- Send to the fallback address. Address the notice to abuse@coomer.su. That address is a convention rather than a published contact, so treat a silent reply as the expected outcome and keep the sent copy as the record that the host route was attempted.
- Find the network in front of coomer.su. Resolve the domain's DNS records to see which network answers for it. Most aggregators sit behind a large CDN, and the CDN — not the site — is the party with a published abuse process and a reason to respond.
- File the network abuse report. Submit the CDN's abuse form with the same URL list and the same evidence. The CDN does not remove content, but it forwards the report to the origin host and to that host's provider, which is the rung that reaches a human.
- File search delisting in parallel, not afterwards. Submit each indexed coomer.su URL for copyright delisting on Google and Bing at the same time as the host notice. Delisting has its own outcome and does not depend on the host answering.
- Record what you sent and when. Keep the recipient, the URL list and the date for every round. Without that record there is no way to tell a host that never replied from one that replied and did nothing, and those two need different next steps.
Where the manual way breaks on coomer.su
The manual route works once. It stops working at volume, because coomer.su indexes by creator handle: one handle can carry hundreds of posts, and each post is its own URL with its own delisting request. Doing that by hand is an evening a week, forever.
openDMCA routes every infringing URL through the Removal Graph — a live map of which hosts actually remove content, how fast, and through which channel — so each takedown takes the shortest path that has historically worked for that host. For a host like coomer.su that has never answered, the graph is what stops the system spending two email rounds finding that out again.
The measurable version: a host whose resolved notices end in removal less than a quarter of the time, over a ninety-day window with at least five samples, is fast-pathed straight to search delisting instead of receiving a second email round.
openDMCA gives the first two hops away: you can open look a host's contact up yourself and run it on a URL of your own, with no account and nothing uploaded.
One thing that catches people out on coomer.su
The RDAP lookup in openDMCA's dispatcher calls the same public bootstrap service any takedown tool would. Probed on 4 September, that service answered "no RDAP service is available for this resource" for every .su domain tested, coomer.su included. Any contact-lookup tool that stops at RDAP returns an empty result for this host — not because the tool failed, but because the registry publishes nothing.