Agent skill

Email Marketing

by kostja94 in kostja94/marketing-skills

When the user wants to plan email marketing, EDM, newsletter strategy, or email deliverability.

MITAuto-check passedMarketing & SEO

Install Email Marketing

skills CLI
$ npx skills add kostja94/marketing-skills --skill email-marketing -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install kostja94/marketing-skills email-marketing --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/kostja94/marketing-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/channels/owned/email-marketing .claude/skills/email-marketing && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
email-marketing
GitHub stars
1k
Token cost
~1.5k tokens
SKILL.md length
621 words
Files
1
Skills in repo
102
Repo updated
First seen
Licence
MIT

At a glance

When the user wants to plan email marketing, EDM, newsletter strategy, or email deliverability.

  • Works in 3 steps: Goal: Retention, conversion, brand… → Content mix: Onboarding, campaign,… → List size: Bulk sender rules…
  • Wants to plan email marketing
  • SKILL.md covers Initial Assessment, EDM vs Newsletter, Five Content Types and User Best Practices, plus 7 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Email Marketing is an agent skill from kostja94/marketing-skills. When the user wants to plan email marketing, EDM, newsletter strategy, or email deliverability. Also use when the user mentions "email marketing," "EDM," "newsletter," "SPF," "DKIM," "DMARC," "email deliverability," "email content strategy," "email campaigns," "newsletter strategy," "email automation," or "cold email." For signup UI, use newsletter-signup-generator.

Its SKILL.md is about 1.5k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Marketing & SEO, covering Email marketing, Newsletters and Transactional email. The repository describes itself as: Agent Skills for Marketing — SEO, Social, Influencer & More. 160+ open-source skills for SEO, content, 40+ page types, paid ads, channels, and strategies. Add project context… The licence is MIT.

When your agent uses it

  • Wants to plan email marketing
  • Newsletter strategy
  • Email deliverability
  • The user mentions email marketing

Example prompts

  • “email marketing,”
  • “newsletter,”
  • “DMARC,”
  • “/email-marketing”

Workflow steps

3 steps, taken from the first numbered list in SKILL.md.

  1. Goal: Retention, conversion, brand reach, or SEO synergy
  2. Content mix: Onboarding, campaign, announcement, features, newsletter
  3. List size: Bulk sender rules (5,000+/day) require Gmail/Yahoo compliance

What it can do on your machine

Read from SKILL.md and the folder at commit 8dd89c5. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Email Marketing loads about 1.5k tokens when it runs. Until then it costs about 96 tokens; SKILL.md has 621 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~96
When it runs · the whole SKILL.md, loaded when a task matches
~1.5k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from kostja94/marketing-skills at commit 8dd89c5, republished under its MIT licence (© kostja94). 621 words, ~1,451 tokens.

Download SKILL.mdSave it as .claude/skills/email-marketing/SKILL.md (or your agent's skills folder).
name
email-marketing
description
When the user wants to plan email marketing, EDM, newsletter strategy, or email deliverability. Also use when the user mentions "email marketing," "EDM," "newsletter," "SPF," "DKIM," "DMARC," "email deliverability," "email content strategy," "email campaigns," "newsletter strategy," "email automation," or "cold email." For signup UI, use newsletter-signup-generator.
metadata.version
1.0.1

Channels: Email Marketing

Guides email marketing strategy for AI/SaaS products. Email ROI ~$36 per dollar spent; open/click rates typically higher than social. Covers EDM vs Newsletter, five content types, deliverability (SPF/DKIM/DMARC), and SEO synergy via article delivery.

When invoking: On first use, if helpful, open with 1-2 sentences on what this skill covers and why it matters, then provide the main output. On subsequent use or when the user asks to skip, go directly to the main output.

Initial Assessment

Project context: Read root contextus.md when present and load only the modules relevant to this task. Without Contextus, use available project material or user-provided facts and ask for missing information; do not create a parallel context system.

Identify:

  1. Goal: Retention, conversion, brand reach, or SEO synergy
  2. Content mix: Onboarding, campaign, announcement, features, newsletter
  3. List size: Bulk sender rules (5,000+/day) require Gmail/Yahoo compliance

EDM vs Newsletter

TypePurposeUse
EDMDirect marketing; conversion-focusedPromotions, campaigns, announcements; bulk sends
NewsletterOngoing value; relationshipIndustry insights, curated articles; regular cadence

Combine both: EDM for push; Newsletter for nurture. Cover different stages and goals.

Five Content Types

TypeUse
OnboardingWelcome + first-use guidance; 5-7 day sequence; behavior-triggered; drive "Aha!" moment
CampaignPromotions, limited-time; conversion or participation
AnnouncementProduct launch, major update; one-time important notice
Features updateNew features, improvements; help users adopt
Blog/NewsletterCurated articles, industry insights; sustained touch

User Best Practices

PracticeGuideline
PersonalizationSegment by behavior, source, stage; boosts open/click
TimingNew users: dense; existing: controlled pace; behavior-triggered > calendar-only
Welcome seriesSend soon after signup; 5-7 emails over days; guide first key action
UnsubscribeOne-click required (Gmail/Yahoo); honor within 48h; clear entry
Complaint rateKeep below 0.3%; list hygiene critical

Content Best Practices

PracticeGuideline
SubjectOne clear topic per email; avoid pure promo
Value firstUseful info before promotion
CTASingle primary CTA; clear next step
Mobile50%+ read on mobile; responsive layout, tappable links

Deliverability & Domain Config

Subdomain: Use subdomain (e.g. mail.example.com) for marketing; keep transactional (support@, etc.) on main domain. Isolate risk.

SPF, DKIM, DMARC
ProtocolPurpose
SPFAuthorizes mail servers for domain
DKIMCryptographic signature; verifies sender
DMARCPolicy for unauthenticated mail; start p=none, then quarantine, then reject over 60-90 days

Order: SPF first, then DKIM, then DMARC. Gmail/Yahoo require all three for bulk senders (5,000+/day) since Feb 2024.

Advanced: TLS-RPT, MTA-STS, BIMI (brand logo). Postmaster Tools: Monitor deliverability, spam rate, auth status.

Show full SKILL.md (223 more words)Show less

Delivery Strategy: Articles + SEO Synergy

Article TypeUse
RetentionDeep content for existing users; improve retention
ToFuTop of funnel; awareness (trends, concepts, problem framing)
MoFuMiddle of funnel; consideration (comparisons, reviews, best practices)

Dual value: (1) Better email engagement (open, click, stickiness); (2) Drive traffic to article pages from non-search channel; signals to Google that users value content; supports SEO.

Measurement: GA4 email source traffic to article pages; GSC rank/click changes.

Planning Framework

  1. Content mix: Allocate onboarding, campaign, announcement, features, newsletter
  2. Select articles: Pick retention, ToFu, MoFu from blog; prioritize SEO target pages
  3. Cadence: Stable frequency (weekly/biweekly/monthly); avoid over-sending
  4. Monitor: Open rate, click rate; GA4 email contribution to article traffic; GSC

Frequency

GuidelineNote
Baseline1 high-value email/week for most brands
Peak timesTue-Thu, 8-11am or 2-4pm (recipient timezone)
SegmentationNew vs loyal need different cadence
QualityRelevant, behavior-triggered > calendar volume

Data: ~36% send 1-3/month; ~30% weekly; daily risks high unsubscribe.

Output Format

  • Content mix (five types)
  • EDM vs Newsletter balance
  • Deliverability (subdomain, SPF/DKIM/DMARC)
  • Article delivery (Retention, ToFu, MoFu, SEO targets)
  • Cadence and frequency
  • KPI (open, click, GA4 email traffic, GSC)
  • content-marketing: Content types, formats; email as channel in repurposing matrix
  • newsletter-signup-generator: Signup form design
  • traffic-analysis: Email source attribution, UTM
  • analytics-tracking: Email click tracking
  • content-strategy: Article selection for email delivery
  • integrated-marketing: Email as owned media channel

© kostja94, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in skills/channels/owned/email-marketing of kostja94/marketing-skills.

Open the folder on GitHubat commit 8dd89c5

Compare with similar skills

Email Marketing next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Email Marketing compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Email Marketing this skillkostja94/marketing-skills1k—~1.5kAutomated safety check: PassMIT
Form Emailjeremylongshore/tons-of-skills-marketplace2.8k—~3.6kAutomated safety check: NotesMIT
Email Marketingsanqiufong/slides-from-anything1321 repos~861Automated safety check: PassApache-2.0
Email Marketingarnabbagxd/Brand-building-skills729—~2.5kAutomated safety check: PassMIT
Newsletterericrisco/rsc-harness180—~2.9kAutomated safety check: PassMIT
49 HTML Email Template Globalminhnv0807/ai-business-skills609—~2.6kAutomated safety check: PassMIT

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Questions about Email Marketing

What does Email Marketing do?

When the user wants to plan email marketing, EDM, newsletter strategy, or email deliverability. Email Marketing is an agent skill from kostja94/marketing-skills. When the user wants to plan email marketing, EDM, newsletter strategy, or email deliverability.

When should I use Email Marketing?

Email Marketing fits situations like: wants to plan email marketing; newsletter strategy; email deliverability; the user mentions email marketing.

How do I install Email Marketing in Claude Code?

Run `npx skills add kostja94/marketing-skills --skill email-marketing -a claude-code`. Or copy the skill folder (skills/channels/owned/email-marketing in kostja94/marketing-skills) into .claude/skills/email-marketing in your project. Claude Code loads it when a task matches its description.

How do I install Email Marketing in Codex?

Run `npx skills add kostja94/marketing-skills --skill email-marketing -a codex`. Or copy the skill folder (skills/channels/owned/email-marketing in kostja94/marketing-skills) into .agents/skills/email-marketing in your project. Codex loads it when a task matches its description.

Can I use Email Marketing in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add kostja94/marketing-skills --skill email-marketing -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/email-marketing, .gemini/skills/email-marketing, .github/skills/email-marketing and .opencode/skills/email-marketing in your project.

What does Email Marketing need to run?

SKILL.md names no scripts, command-line tools or credentials: Email Marketing is instructions for the agent only.

Does Email Marketing access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Email Marketing safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Email Marketing use?

Email Marketing is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Email Marketing use?

About 1.5k tokens (SKILL.md is roughly 5.8k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Email Marketing?

Skills that share tags, products or a category with Email Marketing: Form Email (jeremylongshore/tons-of-skills-marketplace, 2.8k stars), Email Marketing (sanqiufong/slides-from-anything, 132 stars), Email Marketing (arnabbagxd/Brand-building-skills, 729 stars) and Newsletter (ericrisco/rsc-harness, 180 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Email Marketing?

kostja94 (a GitHub user) maintains it in kostja94/marketing-skills, which has 1,025 GitHub stars. The repository holds 102 skills in this directory. The repository was last updated on October 6, 2026.

Source: kostja94/marketing-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.