openinbox.io is a disposable email domain

openinbox.io is a disposable temp email domain from openinbox.io that provides throwaway email addresses and should be blocked. These temporary addresses are frequently exploited to bypass verification systems and create fake accounts.

Raw API JSON response:

{
    "valid": true,
    "block": true,
    "domain": "openinbox.io",
    "base_domain": "openinbox.io",
    "text": "Disposable \/ temporary domain",
    "reason": "Heuristics x1",
    "risk": 70,
    "is_disposable": true,
    "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": false,
    "is_role_based_email": false,
    "mx_host": "mx2.privateemail.com",
    "mx_ip": "162.255.118.8",
    "mx_info": "Using MX pointer mx2.privateemail.com from DNS with priority: 10",
    "mx_fallback": false,
    "mx_hosts": [
        "mx2.privateemail.com",
        "mx1.privateemail.com"
    ],
    "mx_ips": [
        "162.255.118.8",
        "162.255.118.7"
    ],
    "mx_priorities": {
        "mx1.privateemail.com": 10,
        "mx2.privateemail.com": 10
    },
    "email_provider": "openinbox.io",
    "disposable_provider": "openinbox.io",
    "possible_typo": [],
    "domain_age_days": 157,
    "domain_created_at": "2026-01-23T00:00:00+00:00",
    "block_status_changed_at": "2026-06-24T22:54:42+00:00"
}