Acceptable Use Policy

1. Introduction

This Acceptable Use Policy ("AUP") governs your use of MailSentinel's services, website, and applications. This AUP is incorporated into and forms part of our Terms of Service.

By using our services, you agree to comply with this AUP. Violation of this policy may result in suspension or termination of your account.

2. Permitted Use

You may use MailSentinel to:

• Monitor DMARC, SPF, and DKIM records for domains you own or are authorized to manage
• Receive and analyze DMARC aggregate and forensic reports for your domains
• Use our free diagnostic tools to check email authentication configurations
• Generate DNS records for email authentication
• Set up alerts and notifications for your domains
• Access dashboards and analytics for your authorized domains
• Integrate with our API in accordance with our documentation and rate limits

3. Prohibited Activities

You may NOT use MailSentinel to:

3.1 Unauthorized Access

• Monitor domains without proper authorization from the domain owner
• Access, tamper with, or use accounts belonging to other users
• Attempt to bypass authentication or security measures
• Exploit vulnerabilities or security flaws in our systems
• Use credentials obtained through phishing or social engineering

3.2 Abuse of Service

• Create multiple accounts to circumvent usage limits or restrictions
• Share account credentials with unauthorized users
• Resell, redistribute, or sublicense the service without authorization
• Use automated systems to excessively query or scrape the service
• Exceed rate limits or attempt to overload our infrastructure
• Interfere with other users' ability to use the service

3.3 Illegal Activities

• Engage in any activity that violates applicable laws or regulations
• Use the service in connection with fraud, phishing, or scams
• Facilitate sending spam or unsolicited commercial email
• Process data in violation of privacy laws (GDPR, CCPA, etc.)
• Support illegal surveillance or stalking activities
• Violate export control laws or sanctions

3.4 Harmful Content

• Upload malware, viruses, or other malicious code
• Transmit content that is defamatory, obscene, or harassing
• Share content that infringes intellectual property rights
• Distribute content promoting violence or illegal activities

3.5 Technical Abuse

• Reverse engineer, decompile, or disassemble the service
• Attempt to derive source code from the service
• Modify, adapt, or create derivative works from the service
• Remove or alter proprietary notices or labels
• Use the service to develop competing products

4. Domain Authorization

4.1 Ownership Verification

We may require you to verify ownership or authorization for domains you add to the service. Verification methods may include:

• Adding a TXT record to your DNS
• Uploading a verification file to your website
• Receiving email at a domain admin address
• Providing documentation of authorization

4.2 Authorization Requirements

You must have one of the following to monitor a domain:

• Domain ownership (registered owner)
• Written authorization from the domain owner
• Employment by or contract with the domain owner
• MSP/agency agreement with the domain owner

5. API and Rate Limits

5.1 Rate Limits

API access is subject to rate limits based on your subscription plan:

5.2 API Best Practices

• Implement exponential backoff for rate limit errors
• Cache responses when appropriate
• Use webhooks instead of polling where available
• Include a User-Agent header identifying your application
• Respect retry-after headers

6. Free Tools Usage

Our free diagnostic tools (domain health check, SPF generator, etc.) are provided for legitimate email administration purposes. You may NOT:

• Use automated scripts to mass-query the tools
• Use the tools for competitive intelligence gathering
• Redistribute tool results commercially without permission
• Use the tools to identify vulnerable targets for attacks

7. Reporting Violations

If you become aware of any violation of this AUP, please report it to us immediately:

We investigate all reports and take appropriate action, which may include account suspension or termination.

8. Enforcement

8.1 Violations

If we determine that you have violated this AUP, we may take one or more of the following actions:

• Issue a warning
• Temporarily suspend your account
• Permanently terminate your account
• Remove or disable access to content
• Report violations to law enforcement
• Pursue legal remedies

8.2 Appeal Process

If you believe enforcement action was taken in error, you may appeal by contacting support@mailsentinel.io within 30 days. Include your account email and a detailed explanation.

9. Changes to This Policy

We may update this AUP from time to time. We will notify you of material changes by posting the updated policy on our website and updating the "Last Updated" date. Continued use of the service after changes constitutes acceptance of the modified policy.

10. Contact Us

For questions about this Acceptable Use Policy: