Is cltec.ru valid?

cltec.ru should be blocked (risk: 75/100). Use the Check-Mail API to detect risky domains.

cltec.ru

cltec.ru 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": "cltec.ru",
    "base_domain": "cltec.ru",
    "text": "Highly suspicious",
    "reason": "Anomalies detected",
    "risk": 75,
    "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": "mx0.cltec.ru",
    "mx_ip": "91.201.54.7",
    "mx_info": "Using MX pointer mx0.cltec.ru from DNS with priority: 1",
    "mx_fallback": false,
    "mx_hosts": [
        "mx0.cltec.ru",
        "mx1.cltec.ru"
    ],
    "mx_ips": [
        "91.201.54.7",
        "91.201.54.8"
    ],
    "mx_priorities": {
        "mx0.cltec.ru": 1,
        "mx1.cltec.ru": 5
    },
    "email_provider": null,
    "disposable_provider": null,
    "possible_typo": [],
    "domain_age_days": 3366,
    "domain_created_at": "2017-06-21T00:00:00+00:00",
    "block_status_changed_at": "2026-09-07T00:11:55+00:00"
}
cltec.ru should be blocked
cltec.ru

Status: Highly suspicious

RISK
HIGH

Domain risk: 75

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Technical Details for cltec.ru

Risk Score

75 / 100

MX Host

mx0.cltec.ru

Last updated: Sep 7, 2026

cltec.ru Domain Age

cltec.ru was registered on June 21, 2017 and is 9 years, 2 months old.

How to Block cltec.ru

You can automatically block cltec.ru 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=cltec.ru"

Get your free API key or read the documentation for integration guides in PHP, Python, JavaScript, and more.

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