email-best-practices Skill (Resend) for Claude: What It Does and How to Install It

Makes Claude follow email best practices: SPF/DKIM/DMARC, consent and compliance, retries, bounces and accessible HTML.

Installs: 14K; on skills.sh
Stars: 208; on GitHub
Files: 11; besides SKILL.md
Updated: Oct 2026; last repo commit

This is a guidance skill from Resend. SKILL.md gives an architecture sketch of a sending pipeline and a table that sends Claude to one of 11 reference guides: deliverability, transactional emails, email capture, marketing emails, compliance, email types, sending reliability, webhooks and events, list management, accessibility and a transactional email catalog.

It loads when you build email features, fix emails going to spam, set up SPF, DKIM or DMARC, or decide between transactional and marketing mail. The folder bundles no scripts.

Good for

Developers whose emails land in spam
Teams building signup, password reset and OTP emails
Marketers checking CAN-SPAM, GDPR and CASL basics
Anyone making emails work with screen readers

Install email-best-practices

Claude Code

Copy this prompt.

Install the email-best-practices skill in Claude Code. Run this command:

/plugin marketplace add resend/resend-skills
/plugin install resend@resend-skills

Then check that it loaded and tell me how to use it.

2
Paste it into Claude Code. It shows the change and asks before running it.

Pick one route. The plugin route installs the resend plugin: 5 skills (counted from the repo tree) and a hosted Resend MCP server entry from mcp.json, which the README says signs in with OAuth. The skills routes install just this skill.

Built from the package data we hold. Not yet tested by us. Source.

What's in the skill

When it loads

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, making emails accessible (alt text, headings, contrast, screen readers), or deciding transactional vs marketing.

Sections in SKILL.md

Architecture Overview
Quick Reference
Start Here

Key facts

Author: Resend (vendor's own repo; named in SKILL.md metadata)
License: MIT
Installs on skills.sh: 13,958 (Nov 2, 2026)
GitHub stars: 208 for the whole resend/resend-skills repo (Nov 2, 2026)
Last repo commit: Oct 28, 2026
What it includes: 12 files including SKILL.md: 11 reference guides. No scripts
skills.sh audits: Gen Agent Trust Hub: pass; Socket: pass; Snyk: pass (Nov 2, 2026)
Works in: Claude Code and Cursor as a plugin, and any Agent Plugins client, per the README
Part of: The resend plugin (version 1.0.5) in resend/resend-skills: 5 skills counted from the repo tree, plus a hosted Resend MCP server entry
Source: SKILL.md names resend/email-best-practices as its source; the README says this copy is synced from there

What it includes

SPF, DKIM and DMARC setup and fixing spam placement
Authentication problems come first when mail goes to spam.
Deliverability
Password reset, OTP and confirmation emails
Transactional emails
Which emails an app needs, by category and app type
Transactional email catalog
Newsletter signup and address validation
Email capture
Newsletters and promotions that need consent
Marketing emails
CAN-SPAM, GDPR and CASL; the guide says it is not legal advice
Compliance
Transactional versus marketing
Email types
Retries, idempotency and error handling
Sending reliability
Process delivery events in real time
Webhooks and events
Bounces, complaints and suppression lists
List management
lang and dir, headings, alt text, title and contrast rules
Accessibility

From the official docs

Questions

How do I install email-best-practices?

Use the install box at the top of this page. The plugin route installs all 5 skills in the Resend repo plus a hosted MCP server entry, and the skills CLI route installs just this skill.

What does the email-best-practices skill do?

It gives Claude rules for building email that gets delivered and follows the law. Claude uses it for SPF, DKIM and DMARC, consent, retries, bounce handling and accessible HTML.

Is this Resend's official skill?

Yes, it is in the vendor's own repo, resend/resend-skills. SKILL.md names Resend as author, and the README says this copy is synced from resend/email-best-practices.

Do I need a Resend account for it?

Its frontmatter lists no environment variables. Some examples call resend.emails.send, so adapt them if you use another provider.

Why are my emails going to spam?

SKILL.md says to check deliverability first because authentication problems are the most common cause, and that Gmail and Yahoo reject unauthenticated email.

Does it give legal advice?

The compliance guide covers CAN-SPAM, GDPR and CASL, and says it is not legal advice and to consult an attorney for your situation.

email-best-practices or the resend skill?

Use this one for rules and design choices. Use the resend skill for the Resend API itself. The repo README lists both, and they are separate installs.

Is it safe?

The folder holds SKILL.md and 11 reference guides, with no scripts. The plugin route adds more than this skill, including a hosted MCP server entry, so read the plugin note in the install box.

Information

updated Nov 2, 2026

Repository: resend/resend-skills
Folder: skills/email-best-practices

resend/resend-skills skills.sh

Sources

Docs, issue trackers and discussions this page is built from.

Show all 6

email-best-practices SKILL.md · github.com
resend-skills README · github.com
deliverability.md · github.com
compliance.md · github.com
sending-reliability.md · github.com
accessibility.md · github.com