Is 5r.biz valid?

5r.biz 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": "5r.biz",
    "base_domain": "5r.biz",
    "text": "Highly suspicious",
    "reason": "Anomalies detected",
    "risk": 80,
    "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": "mx1.improvmx.com",
    "mx_ip": "15.236.236.160",
    "mx_info": "Using MX pointer mx1.improvmx.com from DNS with priority: 10",
    "mx_fallback": false,
    "mx_hosts": [
        "mx1.improvmx.com",
        "mx2.improvmx.com"
    ],
    "mx_ips": [
        "15.236.236.160",
        "13.37.195.136",
        "35.181.18.45",
        "13.36.222.39",
        "15.236.61.92",
        "13.36.107.63"
    ],
    "mx_priorities": {
        "mx1.improvmx.com": 10,
        "mx2.improvmx.com": 20
    },
    "email_provider": "ImprovMX",
    "disposable_provider": null,
    "possible_typo": [],
    "domain_age_days": 6182,
    "domain_created_at": "2009-10-08T00:00:00+00:00",
    "block_status_changed_at": "2026-08-31T14:44:48+00:00"
}