The Best Email Skills for Claude Code (Deliverability, Campaigns, Compliance)
The Best Email Skills for Claude Code (Deliverability, Campaigns, Compliance)
Email is where AI-generated content goes to die in spam folders. The email skill category exists to prevent that — deliverability checks, campaign structure, list hygiene, and rendering that actually works across clients.
We evaluated the category on our six-dimension rubric. The bar was high: email skills that look good in a demo but fail Gmail's spam filters score poorly here.
1. deliverability-qa — the one to install first
Pre-flight checks before any send: SPF, DKIM, DMARC, blacklists, sender reputation signals. What makes it the category leader isn't the checklist — it's that it fails closed. No green light without evidence.
What people get wrong: running it once. Deliverability is a moving target; re-run before every campaign, not just at setup.
2. email-render-builder — HTML that survives
Builds email HTML that renders across Gmail, Outlook, and Apple Mail. The skill knows the graveyard: Outlook's Word rendering engine, Gmail's CSS stripping, dark mode inversions. Tested patterns, not theoretical CSS.
What people get wrong: skipping the test send. The skill generates client-specific previews — actually look at them.
3. email-creative-builder — copy with structure
Drafts the email itself: subject lines, body, CTA. Solid task routing separates promotional, transactional, and lifecycle emails. Scored well on content quality — the templates embed real constraints (character limits, preview-text optimization) instead of generic "write engaging copy."
4. list-hygiene-monitor — the unglamorous one
Watches list health over time: bounce rates, spam complaints, inactive segments. Nobody's favorite skill, but it's the difference between a list that appreciates and one that decays into a spam trap.
What people get wrong: treating it as a one-time cleanup. It's a monitor — let it run.
What the category gets wrong (as a whole)
Most email skills optimize for sending. Almost none optimize for consent — recording where addresses came from, honoring unsubscribes across systems, documenting lawful basis. The top-rated skills in our evaluation all had consent-aware design; the rest didn't. If you're building email skills, that gap is your opportunity.
The verification standard
Our rubric gives workflow design 25 points, and email is where that earns its weight. An email skill without a "verify before send" gate is a loaded gun. The four above all have one.
All scores and per-dimension rationale are public — see the methodology, browse all email skills or the marketing collection.