How to use
- Copy the installation command and review the source package before installing it in your own agent environment.
- Check the source document for required tools, credentials and supported hosts.
- Describe your input and desired deliverable; review the output against the source material.
npx skills add https://github.com/resend/resend-skills --skill email-best-practicesBefore you start
- Installation does not include a model subscription, API allowance or permission to access your files.
- Repository stars and installation counts describe activity, not an independent quality or security test.
Rendered from the source repository. Headings, examples, code, tables, links, and referenced images are preserved.
Email Best Practices
Guidance for building deliverable, compliant, user-friendly emails.
Architecture Overview
[User] → [Email Form] → [Validation] → [Double Opt-In]
↓
[Consent Recorded]
↓
[Suppression Check] ←──────────────[Ready to Send]
↓
[Idempotent Send + Retry] ──────→ [Email API]
↓
[Webhook Events]
↓
┌────────┬────────┬─────────────┐
↓ ↓ ↓ ↓
Delivered Bounced Complained Opened/Clicked
↓ ↓
[Suppression List Updated]
↓
[List Hygiene Jobs]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 |
| Make emails accessible (screen readers, alt text, contrast) | Accessibility |
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).
Accessibility? Most emails fail basic accessibility checks. See Accessibility for lang/dir, presentational tables, headings, alt text, <title>, and contrast.
