"Understanding RAG (Retrieval-Augmented Generation or related topics)" matching MCP servers:

Enables read-only search and retrieval of your email across multiple IMAP accounts through a local notmuch index, served over authenticated HTTP for MCP clients like Claude or Codex.

Integrates with Gmail APIs to manage emails and labels, including sending, deleting, summarizing, and semantic search via RAG.

Reads and searches your local Microsoft Outlook desktop mailbox via COM, supporting folder listing, message/thread retrieval, attachment saving, bulk export, and draft creation without sending, requiring no OAuth or admin consent.

Enables pushing enriched leads into Instantly or Smartlead campaigns with ICP score gating, deduplication, and dry-run previews via an Apify actor.

This MCP server provides comprehensive Google Workspace integration (Gmail, Drive, etc.) with multi-user OAuth. Unique features include RAG-powered natural language to Chat card rendering, runtime Jinja2 macro creation, and dynamic tool management.

An MCP server that exposes a local notmuch email database to an LLM client such as Claude. It is read-first: searching, reading, and understanding mail is always available; writing anything (drafts, tags, exported files) requires an explicit opt-in flag and is confined to clearly bounded locations.

Read-only MCP server that connects to multiple IMAP accounts, enabling cross-account email listing, search, and retrieval without modifying mailboxes.

Enables connecting and searching multiple Gmail or Google Workspace accounts via friendly aliases, with read-only access and source mailbox attribution for each result.

A Gmail MCP server that enables Claude to send, search, and read emails using either Gmail API or SMTP/IMAP backend.

Access 5+ ATXP agent tools via MCP: web search, AI image generation, email, and music generation. Free tier with pay-per-use Pro tier via x402 micropayments (USDC on Base mainnet).

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

Provides read-only search and retrieval of archived emails, archive statistics, health, and ingestion sources, with an optional administrative toolset for user, role, reindexing, and queue management.

Enables interaction with Outlook Web through its internal API, supporting email search, folder listing, email retrieval, read state changes, calendar events, and reply drafts without Microsoft Graph or COM.

Gives Claude (or any LLM) full control over Apple Mail — read, search, compose, reply, move, flag, and delete messages — via AppleScript on your local machine, with no cloud intermediary.

MCP server that converts .eml email exports (Gmail, Outlook, and other archives) into clean Markdown with YAML front matter — splitting reply threads, stripping signatures and quoted history, extracting attachments, and parsing calendar invites. Built for feeding archived email into RAG and LLM pipelines.

Managed email for AI agents. Connect Gmail, iCloud, Fastmail, or any IMAP/SMTP inbox to Claude and other MCP clients.

The most complete Resend MCP server — full coverage of the Resend API (emails, domains, contacts, broadcasts, templates, segments, topics, webhooks, logs) plus a unique debug/diagnostics layer no other Resend MCP offers: deliverability analysis, DNS troubleshooting, email lifecycle inspection, bounce explanation, and account auditing. Works with Claude Code, Cursor, Claude Desktop, and any other

Enables fetching and analyzing emails from Tencent Exmail or any IMAP service, with tools to list yesterday's emails.

MCP server for value-first cold outreach to local service businesses, enabling personalized cold email generation and lead scoring.

An MCP server that exposes a mock email verification tool over stdio transport, providing structured JSON results with statuses valid, invalid, or risky.