---
title: "MailDev SMTP Capture and Email Testing Server"
description: "MailDev is a local SMTP server with a web UI and REST API for capturing application email during development. It lets agents and test workflows inspect messages, attachments, and relay behavior without touching real inboxes."
verification: "security_reviewed"
source: "https://github.com/maildev/maildev"
author: "maildev"
category:
  - "Calendar, Email & Productivity"
framework:
  - "Multi-Framework"
tool_ecosystem:
  github_repo: "maildev/maildev"
  github_stars: 5892
---

# MailDev SMTP Capture and Email Testing Server

MailDev is a local SMTP server with a web UI and REST API for capturing application email during development. It lets agents and test workflows inspect messages, attachments, and relay behavior without touching real inboxes.

## Installation

Choose whichever fits your setup:

1. Copy this skill folder into your local skills directory.
2. Clone the repo and symlink or copy the skill into your agent workspace.
3. Add the repo as a git submodule if you manage shared skills centrally.
4. Install it through your internal provisioning or packaging workflow.
5. Download the folder directly from GitHub and place it in your skills collection.

## Source

- [Agent Skill Exchange](https://agentskillexchange.com/skills/maildev-smtp-capture-and-email-testing-server/)