"A simple MCP server or implementation" matching MCP servers:

Enables sending, listing, searching, and reading Outlook emails through Microsoft Graph API with OAuth authentication.

Enables reading and writing email through IMAP and SMTP accounts using natural language via the Model Context Protocol.

Provides AI agents with real email infrastructure, enabling them to create inboxes, send/receive messages, and extract verification codes from incoming mail.

Enables AI agents to send emails, create drafts in Gmail, and append content to Google Docs via standardized MCP tools.

Enables managing multiple Gmail accounts under one OAuth client, with per-account access levels, cross-account search, and read/write operations via stdio or Streamable HTTP.

A local MCP server that gives Claude read/write access to a personal Hotmail/Outlook.com mailbox via the Microsoft Graph API, exposing tools for listing, searching, sending, and drafting emails.

A read-only MCP server that connects to Proton Mail via Proton Bridge, enabling AI assistants to search, list, and read emails securely without leaving your machine.

Enables email address verification through a single MCP tool, returning whether an address is valid, invalid, or risky.

A local MCP server that lets Claude read macOS Mail.app via JXA, with tools for listing accounts/mailboxes, searching and reading messages. Read-only by default, with optional opt-in write tools for compose drafts and Apple Calendar events.

A secure Gmail MCP server that lets Claude search, read, and triage mail, draft replies, and send drafts—with encrypted credential storage, scoped OAuth permissions, and explicit human checkpoints before any irreversible action.

Minimal FastMCP server demo with example tools like generating leave request emails.

A lightweight MCP server for personal Microsoft Outlook/Hotmail accounts, enabling email search, reading, attachment management, and folder operations via Microsoft Graph API with OAuth device-code flow.

An MCP server for the Resend email API, enabling AI assistants to send emails, manage contacts, audiences, and domains through natural language.

An MCP server that enables AI assistants to send emails via SMTP, supporting simple and custom emails with attachments and CC/BCC, plus connection testing.

MCP server for reading, searching, and sending ProtonMail emails via the ProtonMail Bridge.

MCP server for Gmail shared inboxes and WhatsApp — read, reply, search, and organize your team's email from Claude, ChatGPT, or Cursor. 47 tools covering email threads, WhatsApp messaging, boards, contacts, knowledge base, analytics, and automations.

A comprehensive MCP server for Gmail, providing 17 tools to read, send, search, and manage emails with OAuth2 authentication, including attachment handling and privacy features.

An MCP server that provides email verification, returning valid, invalid, or risky status with detailed checks and metadata. It enables verifying email addresses via a simple tool interface.

Enables Claude Desktop or Claude Code to access a Yahoo Mail account over IMAP/SMTP, supporting listing, searching, reading, and sending emails through natural language.

Enables AI assistants to interact with Microsoft 365 and Office services through the Microsoft Graph API, providing tools for email, calendar, files, Teams, SharePoint, and more with configurable permissions and output formats.