# Email Delivery

> Use the email_delivery core tool to test and send email through Resend, Mailgun, and SendGrid from core runtime.

- Skill: `argentaios/email-delivery` (Agent Skill)
- Install (CLI): `npx skillmds@latest add argentaios/email-delivery`
- Raw SKILL.md: https://api.skillmd.com/api/skills/argentaios/email-delivery/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Productivity
- Author: argentaios (https://skillmd.com/u/argentaios)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/argentaios/email-delivery

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# Email Delivery Skill

Use `email_delivery` for provider-based email sending.

Primary actions:

- `test_provider`
- `send_resend`
- `send_mailgun`
- `send_sendgrid`

Supported keys:

- `RESEND_API_KEY`
- `MAILGUN_API_KEY` (or `MAILGUN_TITANIUM_API_KEY`) and `MAILGUN_DOMAIN`
- `SENDGRID_API_KEY`