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.
Best use case
email-systems is best used when you need a repeatable AI agent workflow instead of a one-off prompt. It is especially useful for teams working in multi. 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.
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.
Users should expect a more consistent workflow output, faster repeated execution, and less time spent rewriting prompts from scratch.
Practical example
Example input
Use the "email-systems" skill to help with this workflow task. Context: 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.
Example output
A structured workflow result with clearer steps, more consistent formatting, and an output that is easier to reuse in the next run.
When to use this skill
- Use this skill when you want a reusable workflow rather than writing the same prompt again and again.
When not to use this skill
- Do not use this when you only need a one-off answer and do not need a reusable workflow.
- Do not use it if you cannot install or maintain the related files, repository context, or supporting tools.
Installation
Claude Code / Cursor / Codex
Manual Installation
- Download SKILL.md from GitHub
- Place it in
.claude/skills/email-systems/SKILL.mdinside 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?
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.
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.
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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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