1. The principle
MailChecked exists to help legitimate senders protect their deliverability and respect their recipients. We will terminate accounts that abuse the service to harm others — without warning, without refund.
2. You may not use MailChecked to
- Validate scraped or purchased lists where the data subjects have not given a lawful basis for being contacted by you. This is the single biggest cause of suspension.
- Support spam, phishing, malware distribution, scams, fraud, or pyramid schemes.
- Harass, dox, threaten, or stalk any individual.
- Validate addresses for credential-stuffing, account-takeover, or enumeration attacks.
- Verify lists you intend to send unsolicited bulk email to, including but not limited to CAN-SPAM, GDPR, PECR, CASL, or Australian Spam Act violations.
- Circumvent rate limits by creating multiple accounts, masking source IPs, or otherwise evading our throttles.
- Resell, white-label, or sublicense the service without our written consent.
- Reverse-engineer, scrape, or attempt to extract our validation cache, scoring weights, or provider classification logic.
- Probe, scan, or interfere with the security or integrity of MailChecked or any third-party system you encounter through our service.
- Submit data you are legally prohibited from disclosing (sealed, classified, etc.).
- Use the service in violation of applicable law in your jurisdiction or the recipient's.
3. Lawful basis is on you
You are solely responsible for confirming that you have a lawful basis to validate every address you submit. "I bought a list" is not a lawful basis under most modern privacy laws.
4. Reputation hygiene
To protect every customer's results, we throttle bulk jobs based on per-IP, per-provider, and per-domain reputation. We may rate-limit, queue, or refuse jobs that would otherwise damage MailChecked's IP reputation — including jobs that mostly target the same domain or that originate from sources known to be associated with spam.
5. Reporting abuse
If you believe a MailChecked customer is using the service to violate this AUP, email abuse@mailchecked.com. We investigate every report.
6. Enforcement
Violations may result in immediate suspension or termination of your account, forfeiture of unused credits, reporting to the relevant authorities, and a permanent ban from re-registration. We have no obligation to provide prior warning.
7. Changes
We may update this policy as new abuse patterns emerge. Continued use of the service after changes constitutes acceptance.