Is rsko.com valid?
rsko.com should be blocked (risk: 45/100). Use the Check-Mail API to detect risky domains.
rsko.com 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": "rsko.com",
"base_domain": "rsko.com",
"text": "Suspicious",
"reason": "Anomalies detected",
"risk": 45,
"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": false,
"is_parked": true,
"is_role_based_email": false,
"mx_host": "rsko.com",
"mx_ip": "76.223.54.146",
"mx_info": "Domain declares it accepts no mail (RFC 7505 null MX).",
"mx_fallback": false,
"mx_hosts": [],
"mx_ips": [],
"mx_priorities": [],
"email_provider": null,
"disposable_provider": null,
"possible_typo": [],
"domain_age_days": 11268,
"domain_created_at": "1995-11-01T00:00:00+00:00",
"block_status_changed_at": "2026-08-26T21:34:31+00:00"
}
Status: Suspicious
Domain risk: 45
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Technical Details for rsko.com
Risk Score
45 / 100
MX Host
rsko.com
Last updated: Aug 26, 2026
rsko.com Domain Age
rsko.com was registered on November 1, 1995 and is 30 years, 10 months old.
How to Block rsko.com
You can automatically block rsko.com 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=rsko.com"
Get your free API key or read the documentation for integration guides in PHP, Python, JavaScript, and more.
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