Acceptable Use Policy

1. Prohibited Content

You may NOT use PostMTA Hosted to send, facilitate, or promote content that:

• Is unlawful, harmful, threatening, defamatory, or invasive of another person's privacy
• Constitutes unsolicited bulk email ("spam"), unsolicited commercial email (UCE), or any bulk message sent without documented recipient consent
• Contains malware, viruses, ransomware, trojans, worms, or any malicious code or software
• Impersonates any person or entity, or misrepresents your affiliation with any person or entity
• Contains phishing, fraudulent offers, deceptive marketing, or "get rich quick" schemes
• Violates the CAN-SPAM Act, CASL, GDPR, UK GDPR, or any other applicable anti-spam or data protection law
• Infringes on any third-party intellectual property, trademark, copyright, or right of publicity
• Contains obscene, pornographic, or explicit material — except for legally age-verified adult-content sites with documented sender compliance practices pre-approved by PostMTA
• Relates to illegal gambling, lottery, or sweepstakes schemes not properly licensed in all recipient jurisdictions
• Relates to the sale of regulated substances, weapons, explosives, or controlled substances
• Contains hate speech, harassment, violence, or content that incites discrimination

2. Prohibited Sending Practices

The following sending practices are strictly prohibited:

• Sending to purchased, rented, scraped, or third-party email lists without documented, verifiable consent from each recipient
• Failing to honour unsubscribe requests within 10 business days
• Using misleading, false, or deceptive subject lines, sender names, or from addresses
• Hiding or falsifying the sender's physical mailing address (required by CAN-SPAM)
• Attempting to circumvent spam filters, reputation systems, rate limits, or sending controls
• Using PostMTA infrastructure to relay email for unauthorised third parties
• Attempting to probe, scan, test, or exploit vulnerabilities in PostMTA systems
• Accessing PostMTA systems for any purpose not explicitly authorised under your plan
• Sending email where the primary purpose is to drive traffic to a landing page that itself violates this AUP

3. List Quality Requirements

To maintain deliverability and protect our shared IP reputation, all senders must comply with these thresholds:

All recipient addresses must have been collected via documented, affirmative opt-in. Addresses must be verifiable (no role accounts such as postmaster@, abuse@, etc.).

4. Enforcement Actions

PostMTA continuously monitors the platform for AUP violations using:

• Spam trap detection and honeypot monitoring across all sending IPs
• Complaint Feedback Loops (FBL) with Gmail, Microsoft (Outlook/Hotmail), Yahoo, and Comcast
• Third-party blocklist monitoring (Spamhaus, SORBS, UCEPROTECT, Barracuda)
• Content scanning for malware signatures and phishing patterns (applied at time of send)
• Anomalous sending velocity detection

Violations result in escalating enforcement actions:

1. Warning: Written notice to the registered account email, with a remediation deadline (typically 48 hours for serious violations)
2. Mandatory unsubscription cleanup: All current suppression lists must be reconciled; no new sending until verified
3. Sending suspension: Temporary halt to all outbound email from the account; access to the dashboard remains
4. Account termination: Permanent removal from the platform, no refund of unused credits; data retained per our Privacy Policy then deleted
5. Referral to authorities: Cases involving illegal content, fraud, or child exploitation are reported to law enforcement without notice

5. Complaint Handling Procedure

When a recipient marks your email as spam (a "complaint"), the following process applies:

1. The ISP forwards the complaint to PostMTA via our FBL integration
2. The sending address is immediately added to your suppression list — you cannot re-send to that address
3. Complaint rate is recalculated across your account
4. If your complaint rate exceeds 0.1%, your account is flagged for review
5. PostMTA may require you to submit a remediation plan before sending can resume

You may not discourage recipients from filing complaints (e.g., pre-checked opt-out boxes, confusing unsubscribe flows).

6. Reporting Abuse

To report a PostMTA customer sending abuse, phishing, or spam:

We aim to acknowledge abuse reports within 4 business hours and take action within 24 hours for credible reports.