Is martinkull.de valid?

martinkull.de is a valid domain that should be allowed to do sign-ups and registrations. Based on our analysis, you should allow this domain.

Raw API JSON response:

{
    "valid": true,
    "block": false,
    "domain": "martinkull.de",
    "base_domain": "martinkull.de",
    "text": "Looks okay",
    "reason": "Heuristics: WM1",
    "risk": 10,
    "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": true,
    "is_self_hosted": false,
    "is_parked": false,
    "is_role_based_email": false,
    "mx_host": "smtpin.rzone.de",
    "mx_ip": "81.169.145.97",
    "mx_info": "Using MX pointer smtpin.rzone.de from DNS with priority: 5",
    "mx_fallback": false,
    "mx_hosts": [
        "smtpin.rzone.de"
    ],
    "mx_ips": [
        "81.169.145.97"
    ],
    "mx_priorities": {
        "smtpin.rzone.de": 5
    },
    "email_provider": "Strato",
    "disposable_provider": null,
    "possible_typo": [],
    "domain_age_days": null,
    "domain_created_at": null,
    "block_status_changed_at": "2026-08-03T09:39:57+00:00"
}