Is sqn.nl valid?
sqn.nl should be blocked (risk: 100/100). Use the Check-Mail API to detect risky domains.
sqn.nl is a domain that should be blocked from sign-ups or registrations. Based on our analysis, you should block this domain. If a user is trying to sign-up using an e-mail on this domain, it's likely that it's a malicious or fraudulent attempt.
Raw API JSON response:
{
"valid": true,
"block": true,
"domain": "sqn.nl",
"base_domain": "sqn.nl",
"text": "Should be blocked",
"reason": "Heuristics: BM1",
"risk": 100,
"is_disposable": false,
"is_email_forwarder": false,
"is_public_free": false,
"is_public_premium": false,
"is_business_provider": false,
"is_isp_email": false,
"is_email_api": false,
"is_web_hosting_email": false,
"is_self_hosted": true,
"is_parked": false,
"is_role_based_email": false,
"mx_host": "mail.sqn.nl",
"mx_ip": "45.131.60.10",
"mx_info": "Using MX pointer mail.sqn.nl from DNS with priority: 10",
"mx_fallback": false,
"mx_hosts": [
"mail.sqn.nl"
],
"mx_ips": [
"45.131.60.10"
],
"mx_priorities": {
"mail.sqn.nl": 10
},
"email_provider": null,
"disposable_provider": null,
"possible_typo": [],
"domain_age_days": 9659,
"domain_created_at": "2000-03-25T00:00:00+00:00",
"block_status_changed_at": "2026-09-02T01:03:51+00:00"
}
Status: Should be blocked
Domain risk: 100
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Technical Details for sqn.nl
Risk Score
100 / 100
MX Host
mail.sqn.nl
Last updated: Sep 2, 2026
sqn.nl Domain Age
sqn.nl was registered on March 25, 2000 and is 26 years, 5 months old.
How to Block sqn.nl
You can automatically block sqn.nl and thousands of other disposable and fraudulent email domains using the free Check-Mail API. Simply query the API with any email domain to get an instant block recommendation.
Example API request:
curl -X POST "https://api.check-mail.org/v2/" \ -H "Authorization: Bearer YOUR_API_KEY" \ -d "domain=sqn.nl"
Get your free API key or read the documentation for integration guides in PHP, Python, JavaScript, and more.
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