Best Email Marketing Skills for Claude Code
Skills for running an email program end to end: subject lines and creative, responsive HTML, a deliverability pre-flight, inbox-placement tracking, segmentation, dynamic personalization, welcome and abandoned-cart sequences, list growth, sponsorship monetization, and A/B test design. All eleven come from one author's suite, which is the point — the stages share a vocabulary, so a campaign that starts in the creative skill arrives at the QA skill with the same assumptions intact. Every one scores 8.5 or better, with no filler entries lying in wait at the bottom of the list.
Use when the user asks to "run a deliverability pre-flight before I send", "check my SPF/DKIM/DMA…
Thorough pre-send deliverability pre-flight with a detailed bundled checklist, explicit S1 flag states, and never-pass-by-default coverage rules; unshipped connector scripts and shared repo docs are the only gaps.
Use when the user asks to "write the email", "draft subject lines", or "build email creative"; pr…
Mature generator: 11-step flow with mode selection, claim-ledger discipline, decision gates, quality bar, and versioned creative freezing; a few suite paths and the de-slop file are not shipped.
Use when the user asks to "build the email HTML", "make this email responsive", "fix dark-mode re…
Excellent email HTML build and QA skill with decision gates, a six-point quality bar, and two substantive bundled references; only weakness is dependence on unshipped repo files like resend.py and shared protocol docs.
Use when the user asks to "audit an email program" or "is this campaign safe to send"; runs a typ…
Rigorous auditor with fail-closed NOT_SCORED semantics, four veto checks, validation checkpoints, and a bundled immutable runtime fallback; dense jargon and uns shipped suite files slightly reduce usability.
Use when the user asks to "track where my emails are actually landing after I send", "read my see…
Well-scoped post-send placement telemetry skill with strong provenance labeling, NEEDS_INPUT fallbacks, and a bundled checklist; depends on many sibling-skill files and resend.py not shipped in the package.
Use when the user asks to "monetize my newsletter", "build a sponsorship rate card", or "model pa…
Disciplined monetization planner with strict Measured-vs-Estimated labeling, never-fabricate rule, decision gates, and consent-gap flagging; single-file package with all detail references uns shipped.
Use when the user asks to "design an email A/B test", "set up a multivariate subject/CTA test", "…
Excellent statistical experiment design content with explicit When-Not, NEEDS_INPUT gates, no-peeking rules and decision ownership. However it is a single 138-line file whose references and experiment.py script live in a parent repo not shipped in the zip, so all cross-skill paths are broken standalone.
Use when the user asks to "personalize the email", "add merge tags / dynamic content", "set up co…
Suite component with excellent What/When/When-Not triggers, decision gates, fallback-safety audit and PII guard, but every cross-skill and shared-reference relative link is broken in the standalone package.
Use when the user asks to "design a welcome flow", "set up an abandoned-cart sequence", "build a …
Suite component with superb What/When/When-Not triggers, nine concrete design steps, decision gates, create-vs-send safety separation and consent guards; most sibling and shared reference links are broken in the standalone zip.
Use when the user asks to "grow my email list", "design a lead magnet / signup incentive", "set u…
Clean acquisition-strategy designer with honest incentive rules, never-invented baselines, anti-gaming referral guard, and consent evidence captured at source; package ships no local references.
Use when the user asks to "build email segments from my list", "make engaged / lapsed / RFM segme…
Suite component with excellent bilingual triggers, eight concrete segmentation steps, NEEDS_INPUT anti-fabrication guards and consent-registry reconciliation; package contains only SKILL.md with all suite links broken.
Score comparison
How the top 11 compare across the six evaluation dimensions (0–10). Full written rationale for every score is on each skill's page.
| Skill | Overall | Trigger | Structure | Workflow | Content | Engineering | Security |
|---|---|---|---|---|---|---|---|
| deliverability-qa | 9.0 | 9.5 | 8.7 | 9.6 | 9.0 | 6.0 | 9.5 |
| email-creative-builder | 9.0 | 9.5 | 8.7 | 9.2 | 9.0 | 7.0 | 9.5 |
| email-render-builder | 9.0 | 9.5 | 8.7 | 9.6 | 9.0 | 6.0 | 9.5 |
| email-quality-auditor | 8.8 | 9.0 | 8.7 | 9.2 | 8.0 | 7.0 | 9.5 |
| inbox-placement-monitor | 8.7 | 9.5 | 8.0 | 9.2 | 8.0 | 6.0 | 9.5 |
| newsletter-monetization-planner | 8.7 | 9.5 | 7.3 | 9.2 | 9.0 | 6.0 | 9.5 |
| send-experiment-designer | 8.7 | 9.5 | 7.3 | 9.6 | 9.0 | 5.0 | 9.5 |
| dynamic-content-personalizer | 8.6 | 9.5 | 7.3 | 9.2 | 9.0 | 4.0 | 10.0 |
| email-sequence-designer | 8.6 | 9.5 | 7.3 | 9.2 | 9.0 | 4.0 | 10.0 |
| list-growth-designer | 8.6 | 9.5 | 7.3 | 8.8 | 9.0 | 6.0 | 9.5 |
| list-segment-builder | 8.5 | 9.5 | 6.7 | 9.2 | 9.0 | 4.0 | 10.0 |
FAQ
What is an email marketing skill for Claude Code?
A SKILL.md package that owns one stage of email work: writing subject lines, building the responsive HTML, running a deliverability pre-flight, designing a welcome sequence, segmenting a list. It activates when your request matches its trigger description, and the good ones hand off cleanly to the next stage instead of trying to do everything.
Do these skills send email for me?
No. They draft, build, and audit; your ESP still does the sending and you still hold the keys. The deliverability and QA skills exist precisely because sending is the risky step — they check the things that get you filtered before a campaign goes out, rather than after.
Where should I start?
With deliverability-qa (9.0) if you already have a list and a sending setup — most email problems turn out to be deliverability problems, and that skill checks them before you send. Starting from zero, list-growth-designer and email-sequence-designer build the first funnel.
Are these all from one author?
Yes, all eleven. For this kind of work that is a feature: the stages are designed to compose, so moving a campaign from creative to QA to experimentation does not lose context in the handoffs. It is also a limitation worth naming — you are reading one strong, coherent opinion about email, not a survey of the whole market.
Every skill here was scored on the same six-dimension rubric — the full scorecard with written rationale is on each skill's page. See more in the Marketing skill collection, or browse all evaluated skills.