# Zerosmtp

A free SMTP relay that still takes a username and password, for devices that cannot do OAuth 2\.0\.

Canonical: https://claudelist.com/listings/mcp-reg-io-github-msgwing-zerosmtp-877f8f4f42

Category: MCP Servers

Source: community · msgwing

Source checked: 2026-10-14

Website: https://www.claudemcp.org/mcp/registry/io-github-msgwing-zerosmtp-877f8f4f4241.html

Publisher description: A free SMTP relay that still takes a username and password, for devices that cannot do OAuth 2.0.

## Install or set up

1. Review the publisher repository and npm package `zerosmtp-mcp@1.0.2` before running it. The MCP Registry declares this package as a stdio server.
2. Install Node.js, then run the command below in your Claude Code project. Check the publisher README for any account or configuration requirements.
3. Restart Claude Code and use `/mcp` to confirm the connection and review its tools and permissions.

```sh
claude mcp add mcp-io-github-msgwing-zerosmtp-877f8f -- npx -y zerosmtp-mcp@1.0.2
```

Installation guide: https://github.com/msgwing/ZeroSMTP