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This MCP server is provided by amotivv, inc., the creators of Memory Box.

[![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)

This MCP server provides email sending functionality using Protonmail's SMTP service. It allows both Claude Desktop and Cline VSCode extension to send emails on your behalf using your Protonmail credentials. ## Compatibility This MCP server is compatible with: - **Claude Desktop App**: The standalone desktop application for Claude - **Cline VSCode Extension**: The Claude extension for Visual Studio Code The same implementation works across both platforms since they both use the Model Context Protocol (MCP) standard. ## Features - Send emails to one or multiple recipients - Support for CC and BCC recipients - Support for both plain text and HTML email content - Comprehensive error handling and logging ## Configuration The server requires the following environment variables to be set in the MCP settings files for both Claude Desktop and Cline: ### Claude Desktop Configuration Located at: `/Users/your-username/Library/Application Support/Claude/claude_desktop_config.json` ### Cline VSCode Extension Configuration Located at: `/Users/your-username/Library/Application Support/Code/User/globalStorage/saoudrizwan.claude-dev/settings/cline_mcp_settings.json` Both configuration files require the following environment variables: - `PROTONMAIL_USERNAME`: Your Protonmail email address - `PROTONMAIL_PASSWORD`: Your Protonmail SMTP password (not your regular login password) - `PROTONMAIL_HOST`: SMTP server hostname (default: smtp.protonmail.ch) - `PROTONMAIL_PORT`: SMTP server port (default: 587 for STARTTLS, 465 for SSL/TLS) - `PROTONMAIL_SECURE`: Whether to use a secure connection (default: "false" for port 587, "true" for port 465) - `DEBUG`: Enable debug logging (set to "true" to see detailed logs, "false" to hide them) For detailed information about Protonmail's SMTP service, including how to get your SMTP password, please refer to the [official Protonmail SMTP documentation](https://proton.me/support/smtp-submission). ## Usage Once configured, you can use the MCP server to send emails with the following tool: ### send_email Sends an email using your Protonmail SMTP account. **Parameters:** - `to`: Recipient email address(es). Multiple addresses can be separated by commas. - `subject`: Email subject line - `body`: Email body content (can be plain text or HTML) - `isHtml`: (Optional) Whether the body contains HTML content (default: false) - `cc`: (Optional) CC recipient(s), separated by commas - `bcc`: (Optional) BCC recipient(s), separated by commas **Example:** ``` protonmail-mcp send_email { "to": "recipient@example.com", "subject": "Test Email from Cline", "body": "This is a test email sent via the Protonmail MCP server.", "cc": "optional-cc@example.com" } ``` ## Troubleshooting If you encounter issues

Protonmail MCP Server

Tools