Legal

Acceptable Use Policy

Last updated: May 29, 2025

Introduction

At Lettermint, we're committed to maintaining a high-quality email ecosystem. Our reputation—and yours—depends on responsible email practices. When emails are sent responsibly, they reach their intended recipients, engagement improves, and everyone benefits.

Poor sending practices harm deliverability for all senders sharing our infrastructure. This is why we've established clear guidelines to ensure our platform remains trusted by inbox providers worldwide.

This Acceptable Use Policy outlines the rules and best practices you must follow when using our services. By adhering to these guidelines, you help us maintain high deliverability rates and a positive sending reputation for all our users.

Email Sending Requirements

Explicit Consent: Only send emails to recipients who have given clear, specific consent to receive communications from you.
No Purchased Lists: Never use purchased, rented, or harvested email lists.
Proof of Consent: Maintain records of how and when consent was obtained for each recipient.

Email Content Requirements

Accurate "From" Information: Your "From," "To," and "Reply-To" information must accurately identify you or your business.
Clear Subject Lines: Subject lines must not be deceptive and should reasonably reflect the content of your message.
Physical Address: Include your valid physical postal address in every email.
Unsubscribe Mechanism: Every marketing email must contain a clear, conspicuous unsubscribe option that remains functional for at least 30 days after sending.
Honor Opt-Outs: Process unsubscribe requests within 10 business days (though we recommend doing so immediately).

Performance Requirements

To maintain the integrity of our platform, we enforce the following performance thresholds:

Spam Complaint Rate: Must remain below 0.1% (1 complaint per 1,000 emails sent)
Hard Bounce Rate: Must remain below 10% (100 bounces per 1,000 emails sent)

Exceeding these thresholds may result in temporary suspension or permanent termination of your account.

Prohibited Content

You may not use our service to send:

Spam: Unsolicited bulk email or messages that recipients have not explicitly requested
Illegal Content: Any content that violates applicable laws or regulations
Harmful Content: Malware, viruses, or other harmful code
Phishing Attempts: Messages designed to fraudulently collect personal information
Deceptive Marketing: False, misleading, or deceptive marketing messages
Adult Content: Pornography or sexually explicit material
Prohibited Industries: Content related to illegal drugs, illegal gambling, firearms, or other heavily regulated industries without proper authorization

Compliance with Email Laws

You must comply with all applicable email and anti-spam laws, including but not limited to:

CAN-SPAM Act (United States)
GDPR (European Union)
CASL (Canada)
PECR (United Kingdom)
Any other applicable local email marketing regulations

Monitoring and Enforcement

We actively monitor sending patterns and recipient feedback to ensure compliance with this policy. We reserve the right to:

Review your email content and sending practices
Request information about your data collection and consent practices
Temporarily suspend accounts that trigger our abuse detection systems
Permanently terminate accounts for serious or repeated violations

Best Practices

To maintain good deliverability and avoid policy violations, we recommend:

Regular List Cleaning: Remove inactive subscribers and hard bounces
Engagement Segmentation: Focus on engaged recipients
Clear Expectations: Tell subscribers what content they'll receive and how often
Quality Content: Send relevant, valuable content to your subscribers
Authentication: Properly configure SPF, DKIM, and DMARC records
Testing: Test emails before sending to large audiences