Cheap TLDs (.cyou, .icu, .top) — spam reputation poison or fine for projects?

These bargain TLDs are reputation poison for anything involving email.

For what it's worth, I have been tracking blocklist overlap for eighteen months now. The cheap promos (.cyou, .icu, .top, .xyz under $2) show up in Spamhaus CSS and SBL listings at roughly 4-7x the rate of legacy TLDs per registered domain. That is not because the TLD itself is bad. It is because the acquisition cost makes them economically rational for snowshoe spammers.

If your project is a static site, a download mirror, a personal wiki, whatever — the TLD does not matter. The browser does not care. But the moment you try to send transactional email or run a newsletter, you are fighting a deliverability headwind. I have seen .icu domains get 550 rejections from Outlook.com on clean IPs with perfect SPF/DKIM/DMARC alignment. The TLD is a weighted signal in their machine learning stack.

So: fine for projects, avoid for email.

Were the other four hundred .cyou domains registered that morning from the same ASN.

This was at my old gig, pre-Contabo. We eventually wrote a filter that auto-escalated any abuse report containing .cyou, .icu, .top, .click, and .work under 48 hours old. Cut ticket volume by maybe 30%. The absurd part was the registrant data: "asdf asdf, 123 Main St, Reykjavik" — every single one. The registry did not care. The registrar was a white-label reseller of a reseller.

Dry humor aside, I have also seen a legitimate photography portfolio on .icu run for three years with zero issues. The TLD is not the crime. The TLD is the neighborhood. You can live there, but do not be surprised when the cops knock.

What could go wrong: the registry gets hijacked!!! The WHOIS server gets MITM'd!!! Your domain gets sinkholed because the TLD itself lands on a threat intel feed!!!

I have seen.top domains get blanket-blocked by corporate proxies. Not the site. The entire TLD. Your "project" becomes unreachable to anyone behind a Palo Alto firewall with the "suspicious TLD" category enabled. That is a real thing. Check your logs if you do not believe me.

For email: what mediaaustin said. For web: you are betting on registry continuity. Some of these bargain TLDs are backed by registries with questionable financials. If they go under, ICANN emergency transition or not, you are looking at months of pain. WARNINGS: do not use them for anything you cannot afford to lose!!!

fail2ban your webserver anyway. 👀

Guys any leads on which registrar is actually cheapest for.icu renewals? I got a client who wants like 50 of them for landing pages. Not email, just geo-targeted redirects. Contabo had them at €1.99 first year but renewal jumped to €12.99 which kills the margin.

I was looking at some panel that had bulk pricing but their API docs were a mess. Recieved an error on every third call. Not worth the headache 🙏

Also does anyone resell through Hostinger? I heard their domain margins are thin but the support is decent. Need to keep cost under $4/yr or the math does not work.

Does this mean I should move my.top portfolio site? I just got it last month because it was $0.99. I am not sending email from it just hosting my projects on a Vultr VPS. Should I be worried.

I do not want my resume site to get blocked by firewalls 😅 I picked.top because I am a student and every dollar counts. If I need to switch what TLD is safest for cheap?

Thanks everyone this forum is so helpful!

One is a public searx instance, one is a file dump for my homelab, one is a joke site. None of them do email. Never had a problem in 2 years.

Numbers:.icu renewal at my registrar is $6.99,.com is $10.99,.net is $12.99. For a throwaway that does not need reputation, that is $4/yr saved. Across 3 domains that is $12. That is like 2 months of a 512MB NAT VPS at OVHcloud. 😂

But yeah I would not run a business on it. I also would not run a business on a $12/yr VPS so maybe my risk tolerance is broken.

@sarahjey: if it is just a portfolio, keep it. If you get a real job and want to look "professional" spend the $10 on a.com later. The SEO difference is zero in my experience.

Many of these budget TLDs use registrars based in jurisdictions with weak data protection. The WHOIS redaction policies vary wildly. I have seen .cyou domains where the privacy service is a shell in a country with no adequacy decision. If you are processing any EU visitor data, that is a potential Schrems II issue for your controller records. Also, to be precise, some corporate firewalls do indeed block these TLDs by default. This is not theoretical. I administer infrastructure for a Mittelstand firm and their Palo Alto unit has .icu, .cyou, .top, and .xyz on a "newly observed domain" restriction with 90-day aging. Legitimate or not, your site is unreachable to that audience for three months. For a personal project, this is acceptable risk. For anything with commercial intent, I would advise against. The

IMO the consensus here is basically right, YMMV depending on your exact use case.

Mediaaustin's data on blocklist rates is the strongest signal: if you need deliverability, avoid. Full stop. Adam20's neighborhood analogy is spot on. Hankels's cost math works for throwaways. Fritz48's firewall point is real and under-discussed.

For sarahjey: keep the .top for now, start saving $1/month for a .com migration if you ever need to look "established." no urgency. Take it with a grain of salt but I have seen plenty of .top and .xyz sites in portfolio reviews. Hiring managers do not check TLDs, they check if the site loads.

One thing not mentioned: some of these TLDs have weird resolver behavior. I had a .cyou domain that took 72 hours to propagate to a few European resolvers. Never figured out why. Not a huge deal, but if you are doing anything time-sensitive, factor that in.

4-7x per registered domain. Or per spam message? Big difference...

Per registered domain. My methodology: I pulled zone file access for .com, .net, .org, .cyou, .icu, .top over 18 months, sampled active delegations monthly, then cross-referenced Spamhaus CSS and SBL listings by domain name. The denominator is domains that exist and resolve, not messages sent.

Per-message would be even worse for the cheap TLDs because the spam volume per bad domain is higher, but I did not have reliable message-level data. What I have is: if you register a .cyou today, the probability it ends up on a blocklist within 90 days is roughly 4-7x that of a .com registered the same day. For legitimate use that should not matter to you directly, but it matters to receivers who use TLD reputation as a coarse signal.