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20 Best Email MCP Servers: compared and ranked, September 2026Ranked from 2,412 matching servers on stars, growth, downloads and maintenance. Updated .

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  • A
    license
    A
    quality
    B
    maintenance
    An MCP server providing comprehensive email capabilities via IMAP and SMTP, enabling AI assistants to read, search, send, manage, schedule, and analyze emails across multiple accounts.
    49
    1,393 npm
    LGPL 3.0
  • A
    license
    Not graded
    quality
    C
    maintenance
    MCP server for email + calendar via classic Outlook on Windows (COM automation). No Azure app registration, no OAuth — it just drives the Outlook desktop client you're already signed into.
    17 npm
    MIT
  • A
    license
    A
    quality
    D
    maintenance
    Enables AI assistants to access Aruba email and calendar services through IMAP, SMTP, and CalDAV protocols. Users can list, search, and send emails with custom signatures, as well as manage calendar events and invitations.
    14
    2
    MIT
  • A
    license
    Not graded
    quality
    C
    maintenance
    A stateless MCP server that forwards calendar operations to a CalDAV server, enabling AI assistants to list, search, create, update, delete events, and query free/busy information via encrypted tokens.
    AGPL 3.0
  • F
    license
    B
    quality
    B
    maintenance
    MCP server providing AI assistants with full access to Microsoft Outlook email and calendar via the Microsoft Graph API, featuring 26 tools for mail, calendar, contacts, and scheduling with delegated authentication.
    29
    -
  • F
    license
    Not graded
    quality
    B
    maintenance
    Enables reading, converting, and managing email messages, calendars, and contacts, along with mail account folder/thread operations and personal name parsing/formatting, via typed MCP tools.
    -
  • A
    license
    A
    quality
    D
    maintenance
    Enables AI assistants to interact with Fastmail services, providing tools for comprehensive email management, contact searching, and calendar event coordination via the JMAP API. It supports advanced features like threaded conversations, attachment handling, and bulk mailbox operations through natural language.
    28
    MIT
  • A
    license
    A
    quality
    D
    maintenance
    A privacy-first MCP server for inbox triage, enabling masked email reading, calendar upsert, reply drafting, and Slack digests using Google and Slack credentials.
    10
    MIT
  • A
    license
    A
    quality
    A
    maintenance
    MCP server for Evite that lets you read and act on events as guest or host: list events, view guest lists, RSVP, send messages, and create/edit events.
    20
    279 npm
    MIT
  • A
    license
    A
    quality
    D
    maintenance
    Enables intelligent integration with Gmail and Google Calendar for context-aware email analysis, advanced searching, and personalized response drafting. It supports natural language interactions for managing communication history, detecting events in emails, and creating calendar entries.
    17
    MIT
  • A
    license
    A
    quality
    B
    maintenance
    Provides full access to Microsoft Outlook calendar and email through Claude Code by intercepting browser tokens from an existing signed-in Edge profile, eliminating the need for Azure app registration.
    24
    12 npm
    1
    Apache 2.0
  • A
    license
    A
    quality
    D
    maintenance
    Self-hosted MCP server that exposes Synology Drive, Spreadsheet, MailPlus, and Calendar as structured tools for AI agents, enabling file, spreadsheet, email, and calendar management via natural language.
    39
    8 npm
    10
    MIT