Is postbw.com valid?
postbw.com should be blocked (risk: 100/100). Use the Check-Mail API to detect risky domains.
postbw.com 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": "postbw.com",
"base_domain": "postbw.com",
"text": "Highly suspicious",
"reason": "Anomalies detected",
"risk": 100,
"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": true,
"is_parked": false,
"is_role_based_email": false,
"mx_host": "mail.postbw.com",
"mx_ip": "156.67.218.25",
"mx_info": "Using MX pointer mail.postbw.com from DNS with priority: 0",
"mx_fallback": false,
"mx_hosts": [
"mail.postbw.com"
],
"mx_ips": [
"156.67.218.25"
],
"mx_priorities": {
"mail.postbw.com": 0
},
"email_provider": null,
"disposable_provider": null,
"possible_typo": [],
"domain_age_days": 180,
"domain_created_at": "2025-12-19T00:00:00+00:00",
"block_status_changed_at": "2026-06-16T14:21:36+00:00"
}
Status: Highly suspicious
Domain risk: 100
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Technical Details for postbw.com
Risk Score
100 / 100
MX Host
mail.postbw.com
Last updated: Jun 16, 2026
postbw.com Domain Age
postbw.com was registered on December 19, 2025 and is 6 months old.
How to Block postbw.com
You can automatically block postbw.com and thousands of other disposable and fraudulent email domains using the free Check-Mail API. Simply query the API with any email domain to get an instant block recommendation.
Example API request:
curl -X POST "https://api.check-mail.org/v2/" \ -H "Authorization: Bearer YOUR_API_KEY" \ -d "domain=postbw.com"
Get your free API key or read the documentation for integration guides in PHP, Python, JavaScript, and more.
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