openinbox.online is a disposable email domain

openinbox.online is a disposable temp email domain from quickmails.eu 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.online",
    "base_domain": "openinbox.online",
    "text": "Disposable \/ temporary domain",
    "reason": "Disposable",
    "risk": 100,
    "is_disposable": true,
    "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": false,
    "is_role_based_email": false,
    "mx_host": "openinbox.online",
    "mx_ip": "188.165.54.171",
    "mx_info": "No MX-pointer in DNS record. Using domain: openinbox.online",
    "mx_fallback": true,
    "mx_hosts": [
        "openinbox.online"
    ],
    "mx_ips": [
        "188.165.54.171"
    ],
    "mx_priorities": {
        "openinbox.online": 0
    },
    "email_provider": null,
    "disposable_provider": "quickmails.eu",
    "possible_typo": [],
    "domain_age_days": 3,
    "domain_created_at": "2026-09-17T00:00:00+00:00",
    "block_status_changed_at": "2026-09-20T18:05:29+00:00"
}