What dependencies are required to run it locally?
Python 3 with the `aiosmtpd` module for the SMTP server, Visual Studio Code with GitHub Copilot, and Rust for building the MCP server.
@AlvinHon
Basic information
An example rust-based MCP server for sending emails.
Add this server to your MCP-compatible client using the configuration below.
{
"mcpServers": {
"rmcp-mailer": {
"command": "python",
"args": [
"-m",
"aiosmtpd",
"-n",
"-l",
"127.0.0.1:2525"
]
}
}
}Tool list not available yet
This listing does not currently have a tool list to display. This does not mean the server has no tools; check its documentation for supported capabilities.
We auto-extract tools from the README. The maintainer can list them under a ## Tools heading to populate this section.
A Rust-based MCP (Model Context Protocol) server that lets users send emails by writing natural-language prompts in LLM chat interfaces such as Cursor and Copilot. It uses the official MCP Rust SDK and the lettre crate as an SMTP client.
For local testing, run a Python SMTP server (python -m aiosmtpd -n -l 127.0.0.1:2525), configure the MCP agent in VSCode, start the agent, then run cargo run. Prompts like “send a formal email to Bob (bob@domain.com)…” are then processed by the LLM.
lettre crate)Python 3 with the `aiosmtpd` module for the SMTP server, Visual Studio Code with GitHub Copilot, and Rust for building the MCP server.
Traditional programs require manual data input; this server lets the LLM interpret natural-language prompts and construct the email automatically.
It uses SMTP, implemented by the `lettre` crate.
Not yet. The README lists “add recipient management” and “support more request types, e.g. schedule meetings” as future TODO items.
The README does not specify any authentication or encryption; the local test example uses plain SMTP on `127.0.0.1:2525`.

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