Is blue303.remar.sbs valid?

blue303.remar.sbs is an email forwarding domain (risk: 100/100). Verify it with the Check-Mail API.

blue303.remar.sbs

blue303.remar.sbs is an email forwarding domain that allows users to create aliases to hide their real email. These alias emails are frequently used by spammers to bypass verification systems.

Raw API JSON response:

{
    "valid": true,
    "block": true,
    "domain": "blue303.remar.sbs",
    "base_domain": "remar.sbs",
    "text": "Highly suspicious",
    "reason": "Anomalies detected",
    "risk": 100,
    "is_disposable": false,
    "is_email_forwarder": true,
    "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": "route1.mx.cloudflare.net",
    "mx_ip": "162.159.205.13",
    "mx_info": "Using MX pointer route1.mx.cloudflare.net from DNS with priority: 10",
    "mx_fallback": false,
    "mx_hosts": [
        "route1.mx.cloudflare.net"
    ],
    "mx_ips": [
        "162.159.205.13"
    ],
    "mx_priorities": [],
    "email_provider": "Cloudflare Email Routing",
    "disposable_provider": null,
    "possible_typo": [],
    "domain_age_days": null,
    "domain_created_at": null,
    "block_status_changed_at": "2026-09-07T05:06:21+00:00"
}
blue303.remar.sbs should be blocked
blue303.remar.sbs

Status: Highly suspicious

RISK
HIGH

Domain risk: 100

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Technical Details for blue303.remar.sbs

Risk Score

100 / 100

MX Host

route1.mx.cloudflare.net

Email Provider

Cloudflare Email Routing

Last updated: Sep 7, 2026

How to Block blue303.remar.sbs

You can automatically block blue303.remar.sbs 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=blue303.remar.sbs"

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

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