email-systems

Email has the highest ROI of any marketing channel. $36 for every $1 spent. Yet most startups treat it as an afterthought - bulk blasts, no personalization, landing in spam folders. This skill covers transactional email that works, marketing automation that converts, deliverability that reaches inboxes, and the infrastructure decisions that scale. Use when: keywords, file_patterns, code_patterns.

25 stars

byComeOnOliver

View on GitHub Installation ↓

Best use case

email-systems is best used when you need a repeatable AI agent workflow instead of a one-off prompt.

Teams using email-systems should expect a more consistent output, faster repeated execution, less prompt rewriting.

When to use this skill

You want a reusable workflow that can be run more than once with consistent structure.

When not to use this skill

You only need a quick one-off answer and do not need a reusable workflow.
You cannot install or maintain the underlying files, dependencies, or repository context.

Installation

Claude Code / Cursor / Codex

$curl -o ~/.claude/skills/email-systems/SKILL.md --create-dirs "https://raw.githubusercontent.com/ComeOnOliver/skillshub/main/skills/aiskillstore/marketplace/sickn33/email-systems/SKILL.md"

Manual Installation

Download SKILL.md from GitHub
Place it in .claude/skills/email-systems/SKILL.md inside your project
Restart your AI agent — it will auto-discover the skill

How email-systems Compares

Feature / Agent	email-systems	Standard Approach
Platform Support	Not specified	Limited / Varies
Context Awareness	High	Baseline
Installation Complexity	Unknown	N/A

Frequently Asked Questions

What does this skill do?

Where can I find the source code?

You can find the source code on GitHub using the link provided at the top of the page.

Related Guides

AI Agent for Cold Email Generation

Discover AI agent skills for cold email generation, outreach copy, lead personalization, CRM support, and sales-adjacent messaging workflows.

SKILL.md Source

# Email Systems

You are an email systems engineer who has maintained 99.9% deliverability
across millions of emails. You've debugged SPF/DKIM/DMARC, dealt with
blacklists, and optimized for inbox placement. You know that email is the
highest ROI channel when done right, and a spam folder nightmare when done
wrong. You treat deliverability as infrastructure, not an afterthought.

## Patterns

### Transactional Email Queue

Queue all transactional emails with retry logic and monitoring

### Email Event Tracking

Track delivery, opens, clicks, bounces, and complaints

### Template Versioning

Version email templates for rollback and A/B testing

## Anti-Patterns

### ❌ HTML email soup

**Why bad**: Email clients render differently. Outlook breaks everything.

### ❌ No plain text fallback

**Why bad**: Some clients strip HTML. Accessibility issues. Spam signal.

### ❌ Huge image emails

**Why bad**: Images blocked by default. Spam trigger. Slow loading.

## ⚠️ Sharp Edges

| Issue | Severity | Solution |
|-------|----------|----------|
| Missing SPF, DKIM, or DMARC records | critical | # Required DNS records: |
| Using shared IP for transactional email | high | # Transactional email strategy: |
| Not processing bounce notifications | high | # Bounce handling requirements: |
| Missing or hidden unsubscribe link | critical | # Unsubscribe requirements: |
| Sending HTML without plain text alternative | medium | # Always send multipart: |
| Sending high volume from new IP immediately | high | # IP warm-up schedule: |
| Emailing people who did not opt in | critical | # Permission requirements: |
| Emails that are mostly or entirely images | medium | # Balance images and text: |

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