postmark-email-best-practices
Installation
SKILL.md
Email Best Practices
Postmark has delivered billions of transactional emails over 15+ years. This skill distills that expertise into actionable guidelines for building reliable, compliant, high-deliverability email systems.
Quick Reference
| Topic | Use When |
|---|---|
| Deliverability | Setting up SPF/DKIM/DMARC, warming a new domain, diagnosing delivery issues |
| Compliance | Building unsubscribe flows, handling GDPR/CAN-SPAM/CASL requirements |
| Transactional Design | Designing welcome emails, password resets, receipts, alerts |
| List Management | Handling bounces, suppressions, list hygiene |
| Testing | Testing safely without hurting sender reputation |
| Sending Reliability | Idempotency, retry logic, rate limits |
Deliverability Fundamentals
The three authentication records every sending domain must have: