---
title: Email Best Practices Skill
sidebarTitle: Email Best Practices
description: Comprehensive guide for building production-ready email systems with AI agents.
---
> For the complete documentation index, see [llms-docs.txt](/llms-docs.txt) or the site index [llms.txt](/llms.txt). Full docs corpus: [llms-full-docs.txt](/llms-full-docs.txt). Prefer markdown URLs (append `.md`) for agent consumption. Product skill: [skill.md](/skill.md).


A comprehensive skill that teaches your AI agent best practices for building production-ready email systems. This skill covers deliverability, authentication, content guidelines, and compliance.

## Installation

```bash
npx skills add reloop/email-best-practices
```

## What's covered

### Deliverability

- SPF, DKIM, and DMARC authentication setup
- Domain warmup strategies for new sending domains
- Reputation management and monitoring
- Bounce handling and suppression lists
- Throttling and rate limiting best practices

### Content Guidelines

- Subject line optimization for engagement
- Plain text vs HTML email best practices
- Image-to-text ratio recommendations
- Call-to-action (CTA) best practices
- Mobile-responsive email design

### Compliance

- CAN-SPAM Act requirements
- GDPR considerations for email
- Unsubscribe link requirements
- Physical address requirements
- Consent management (opt-in/opt-out)

### Transactional vs Marketing

- When to use transactional emails vs marketing emails
- Separate sending domains and IP pools
- Appropriate content for each type
- Legal distinctions and requirements

### Error Handling

- Retry strategies for failed sends
- Handling bounces (hard vs soft)
- Managing complaint feedback loops
- Monitoring delivery rates and engagement metrics

## Rules

The skill provides your agent with actionable rules such as:

- Always include a plain text version alongside HTML
- Never use a no-reply sender address for marketing emails
- Always verify your sending domain before sending at scale
- Use dedicated subdomains for transactional and marketing email
- Implement exponential backoff for API retries
- Always include an unsubscribe mechanism in marketing emails

## Learn More

- [Sending Emails](/learn/sending) — Guide to sending emails with Reloop
- [Domains](/learn/domain) — Domain verification and DNS configuration
- [View on GitHub](https://github.com/reloop-labs/reloop-skills/tree/main/skills/email-best-practices)