# Deliverability Check

> Make sure your emails land in the inbox before you send a single one.

Category: Outreach · Status: draft · Price: free (MIT) · Output: Checklist and fixes

It checks your sending domain setup (SPF, DKIM, DMARC), looks for spam triggers in your drafts and links, and gives you a short list of fixes.

## Use it when
- Anyone sending cold email for the first time.
- Campaigns with falling open rates.

## Do not use it for
- Warming up inboxes for you.
- Bypassing spam filters.

## Input
Sending domain and drafts

## What it produces
A pass or fix list for your domain and drafts.

- Domain setup checked.
- Spam triggers flagged in your drafts.
- Fixes in plain words.

## What it needs
Nothing extra. Uses public DNS lookups.

Bring your own API keys. Ekos never asks for, receives or stores them.

## Install and run
1. Get the skill: `git clone https://github.com/Ekos-Labs/skills.git`, then use `skills/deliverability-check`. Or read it directly: https://raw.githubusercontent.com/Ekos-Labs/skills/main/skills/deliverability-check/SKILL.md
2. Copy the folder into your agent's skills directory (Claude Code: `~/.claude/skills/`, Codex: `~/.agents/skills/`), or tell your agent:

```text
Read https://raw.githubusercontent.com/Ekos-Labs/skills/main/skills/deliverability-check/SKILL.md and use it for this task. Ask me before using any paid API.
```

Install guide: https://www.ekoslabs.com/skills/install.md

## Links
- Human page: https://www.ekoslabs.com/skills/deliverability-check
- Source: https://github.com/Ekos-Labs/skills/tree/main/skills/deliverability-check
- All skills: https://www.ekoslabs.com/skills/llms.txt
- Machine-readable catalog: https://www.ekoslabs.com/skills/catalog.json