By mailwarm
Diagnoses and fixes email deliverability issues by checking SPF, DKIM, DMARC, BIMI records, blacklist status, and SMTP/IMAP server connectivity. Generates DNS records for email authentication.
npx claudepluginhub mailwarm/mailx-skills --plugin email-deliverabilityFree Agent Skills from MailX that teach AI agents how to diagnose and fix email deliverability issues using the MailX MCP server.
What's a Skill? A
SKILL.mdfile with workflow instructions an AI agent loads on demand. The format is an open standard adopted by Anthropic (Claude) and OpenAI (Codex CLI, ChatGPT). Learn more at agentskills.io.
Diagnoses and fixes email deliverability issues by checking SPF, DKIM, DMARC, BIMI records, blacklist status, and SMTP/IMAP server connectivity. Generates DNS records for email authentication.
Activates when the user asks about: email going to spam, domain reputation, DNS authentication setup, mail server configuration, sender verification, or email infrastructure troubleshooting.
/plugin marketplace add Mailwarm/mailx-skills
/plugin install email-deliverability@mailx-skills
That's it. The skill activates automatically when relevant.
SKILL.mdcurl -X POST https://api.anthropic.com/v1/skills \
-H "x-api-key: $ANTHROPIC_API_KEY" \
-H "anthropic-beta: skills-2025-10-02" \
-F "display_title=Email Deliverability" \
-F "files[]=@plugins/email-deliverability/skills/email-deliverability/SKILL.md"
Then reference the returned skill_id when calling the Messages API.
The skill requires the MailX MCP server for the actual tool execution. To install the MCP server in Claude Desktop / Cursor / Claude Code:
{
"mcpServers": {
"mailx": {
"type": "http",
"url": "https://tools.themailx.com/mcp"
}
}
}
Full setup guide: tools.themailx.com/mcp/docs
mailx-skills/
├── .claude-plugin/
│ └── marketplace.json ← Claude Code marketplace catalog
└── plugins/
└── email-deliverability/
├── .claude-plugin/
│ └── plugin.json ← Plugin manifest
└── skills/
└── email-deliverability/
├── SKILL.md ← The skill content
└── references/
└── diagnosis.md ← Diagnosis decision tree
The current SKILL.md is dynamically generated from the live MailX tool catalog at tools.themailx.com/skills/email-deliverability/SKILL.md. This repo is the static, versioned distribution snapshot used by Claude Code marketplace installs.
MIT — see LICENSE
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