Is skimu.org a disposable email address?
skimu.org is blocked
Yes — skimu.org is a disposable email domain, operated by tempmail.ninja. IsTempMail first identified it on and last re-verified it on .
Sign-ups from skimu.org addresses should be blocked; the IsTempMail API flags this domain, and every other domain on its blocklist, automatically.
Automated determination from DNS, infrastructure, spam and abuse report signals, re-verified continuously. Wrongly listed? Dispute here.
- First identified
- Last verified
- domains by this provider
- 325
- disposable domains tracked
- 144,948
Krea
How sign ups from disposable emails hurt you
Skewed analytics, email deliverability issues, excess operational cost.
Fake users in your funnel
Your CRO and Growth team will agree. Fake user sign-up skew measurements of CVR, CAC, M/DAU and basically every other user metric.
Sender reputation damage
Temporary addresses expire. When you send email to them, bounce rate will go up - and your reputation goes down.
Free account abuse
Disposable addresses are free and unlimited. Abusers create unlimited rotating accounts or start unlimited trial phases. Learn more about free account abuse.
Why skimu.org is blocked
skimu.org is part of the tempmail.ninja fleet of disposable email domains, all of which are blocked. skimu.org is one of 325 domains operated by tempmail.ninja.
Mail infrastructure
Mail servers
| Mail host | Resolves to |
|---|---|
| alt1.aspmx.l.google.com | 192.178.234.27 |
| alt2.aspmx.l.google.com | 172.253.116.27 |
| alt3.aspmx.l.google.com | 192.178.223.27 |
| alt4.aspmx.l.google.com | 172.253.157.26 |
| aspmx.l.google.com | 142.251.167.27 |
IP addresses
104.21.80.162, 172.67.151.120Blocklist status
- First identified
- Last verified
- Operated by
- tempmail.ninja
- Website
- tempmail.ninja
Blocked since and re-verified as recently as — this page reflects the domain’s current DNS state. How we verify domains
How to block skimu.org
Check every address against the IsTempMail API before you create the account. One GET request, one JSON field. skimu.org and every other tempmail.ninja domain come back blocked: true.
GET https://www.istempmail.com/api/check/YOUR_TOKEN/skimu.org
→ { "name": "skimu.org", "blocked": true }$ curl https://www.istempmail.com/api/check/YOUR_TOKEN/skimu.org
→ { "name": "skimu.org", "blocked": true }const r = await fetch('https://www.istempmail.com/api/check/' + TOKEN + '/' + domain);
if ((await r.json()).blocked) reject('Please use a permanent email address');$r = json_decode(file_get_contents("https://www.istempmail.com/api/check/$token/$domain"));
if ($r->blocked) { // reject the sign-up }r = requests.get(f"https://www.istempmail.com/api/check/{TOKEN}/{domain}").json()
if r["blocked"]: raise ValueError("Please use a permanent email address")No code? Add the WordPress plugin or read the API docs.
Frequently asked questions
Should I block sign-ups from skimu.org?
Yes. IsTempMail tracks tempmail.ninja as a disposable email operation and blocks skimu.org as part of its fleet. Rejecting its addresses at registration protects your list quality.
How do I block this domain and others like it?
Check addresses against the IsTempMail API at sign-up: it catches the full tempmail.ninja fleet in real time. A free tier is available — see the how-to-block section on this page.
When was skimu.org blocked, and is this current?
It was first identified on and last re-verified on . IsTempMail re-checks blocked domains continuously, so this verdict reflects the domain’s current DNS state.
Who operates skimu.org?
It is operated by tempmail.ninja, a disposable email provider with 325 tracked domains. See the tempmail.ninja provider page for the list of its domains.
Is this domain wrongly listed?
The block decision was determined automatically from DNS, infrastructure, spam and abuse report signals. If you run this domain as a legitimate mailbox service, dispute the block here. Every dispute is processed by a human.
Stop checking domains by hand
One endpoint, one JSON field, 144,948 temporary email domains behind it.