Is companhiadasletras.com.br valid?

companhiadasletras.com.br is a domain that should be blocked from sign-ups or registrations. Based on our analysis, you should block this domain. If a user is trying to sign-up using an e-mail on this domain, it's likely that it's a malicious or fraudulent attempt.

Raw API JSON response:

{
    "valid": true,
    "block": true,
    "domain": "companhiadasletras.com.br",
    "base_domain": "companhiadasletras.com.br",
    "text": "Highly suspicious",
    "reason": "Anomalies detected",
    "risk": 90,
    "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": false,
    "is_self_hosted": false,
    "is_parked": true,
    "is_role_based_email": false,
    "mx_host": "us-smtp-inbound-1.mimecast.com",
    "mx_ip": "170.10.132.221",
    "mx_info": "Using MX pointer us-smtp-inbound-1.mimecast.com from DNS with priority: 1",
    "mx_fallback": false,
    "mx_hosts": [
        "us-smtp-inbound-1.mimecast.com",
        "us-smtp-inbound-2.mimecast.com"
    ],
    "mx_ips": [
        "170.10.132.221",
        "170.10.132.141",
        "170.10.128.141",
        "170.10.132.242",
        "170.10.128.221",
        "170.10.128.242"
    ],
    "mx_priorities": {
        "us-smtp-inbound-1.mimecast.com": 1,
        "us-smtp-inbound-2.mimecast.com": 2
    },
    "email_provider": "Mimecast",
    "disposable_provider": null,
    "possible_typo": [],
    "domain_age_days": 10706,
    "domain_created_at": "1997-05-15T00:00:00+00:00",
    "block_status_changed_at": "2026-07-14T00:47:41+00:00"
}