Agent skill · marketing growth · sundial-org
email-best-practices
Use when building email features, emails going to spam, high bounce rates, setting up SPF/DKIM/DMARC authentication, implementing email capture, ensuring compliance (CAN-SPAM, GDPR, CASL), handling webhooks, retry logic, or deciding transactional vs marketing.
Why this skill is useful
Provides specific guidance on email deliverability, compliance, and handling various email types that the AI wouldn't reliably generate on its own.
What it needs
About 1k tokens when loaded. Last updated 2026-03-07. 639 stars on the source repository.
What this skill does
Email Best Practices Guidance for building deliverable, compliant, user-friendly emails. Architecture Overview Quick Reference Need to... See ------------ ----- Set up SPF/DKIM/DMARC, fix spam issues Deliverability Build password reset, OTP, confirmations Transactional Emails Plan which emails your app needs Transactional Email Catalog Build newsletter signup, validate emails Email Capture Send newsletters, promotions Marketing Emails Ensure CAN-SPAM/GDPR/CASL compliance Compliance Decide transactional vs marketing Email Types Handle retries, idempotency, errors Sending Reliability Process delivery events, set up webhooks Webhooks & Events Manage bounces, complaints, suppression List Management Start Here New app? Start with the Catalog to plan which emails your app needs (password reset, verification, etc.), then set up Deliverability (DNS authentication) before sending your first email. Spam issues? Check Deliverability first—authentication problems are the most common cause. Gmail/Yahoo reject unauthenticated emails. Marketing emails? Follow this path: Email Capture (collect consent) → Compliance (legal requirements) → Marketing Emails (best practices). Production-ready sending? Add reliability: Sending Reliability (retry + idempotency) → Webhooks & Events (track delivery) → List Management (handle bounces).
How to use it
Reference it in AdaL, Claude Code, Cursor or any coding agent — nothing to install:
@skills sundial-org/email-best-practices