Discover the Best AI Tools

Local single-binary MCP connecting agents to Microsoft Graph for Outlook calendars, events, mail reading and draft creation. Requires Microsoft tenant/application configuration and user authorization. Local hosting does not eliminate Graph network access or downstream model processing; Docker deployments use a persisted auth volume with different credential-storage tradeoffs from the native keychain.

Self-hosted service unifying Gmail, Microsoft and IMAP/SMTP mailboxes through MCP, REST and CLI, with per-client permissions and encrypted credentials. Requires configured mailbox access and a supported Node.js runtime. Personal use has mailbox/member limits; paid entitlements and Elastic License 2.0 restrictions apply, including limits on offering the software as a managed service.

SendGrid MCP for transactional mail, templates and diagnostics, with preview-bound send tokens, rate limits and optional recipient allowlists. Requires SendGrid credentials; writes default to dry-run while reads still contact the API. Confirm tokens return to the model, so two-phase sending alone is not human approval. Marketing campaigns are out of scope.

Local converter turning exported EML messages into Markdown and YAML metadata, with thread handling, attachment extraction and MCP access. No live mailbox, PST, MSG or MBOX input. Job state resets on restart and binary attachments need separate text extraction. PolyForm Noncommercial licensing requires a separate license for commercial use.

Agent-focused hosted email provider with JMAP mailbox operations, command-line tooling and MCP integrations for reading, sending, drafts and threads. Requires a service account and credentials; storage and rate limits apply. It provides a real inbox rather than local-only mail processing, and inbound messages remain untrusted input for the connected agent.

Markdown-to-email renderer producing responsive HTML and plain text, with Node.js, React preview and MCP render/lint tools. Requires Node.js 20 for local use. Rendering and linting do not send messages or guarantee inbox placement or identical display in every mail client; delivery needs a separate mail provider.

Email-address verification CLI, MCP and API returning a recommendation with reasons. Local DNS checks need no key; deeper hosted SMTP probing requires an account and credits. Catch-all, greylist or refusal results remain uncertain, and a send recommendation is neither delivery proof nor permission to contact the address.

Hosted or self-hosted MCP email service for searching, sending, organizing and scheduling across connected mailboxes. Requires provider authorization and scoped access. Hosted plans limit inboxes, actions or request rates. Messages are fetched on demand according to the service design, but processing still involves the mail service and the connected agent/model.

Communication infrastructure giving agents email, SMS and outbound voice capabilities through APIs and integrations. Requires mail infrastructure or providers, credentials and configured telephony for phone features; provider charges can apply. Outbound pattern checks can hold suspicious messages for human approval but do not guarantee every sensitive disclosure is detected.

Local MCP server connecting Microsoft Graph and IMAP mailboxes, calendars, searchable indexes and registered knowledge files to an existing agent. No built-in LLM. Dangerous actions require OS-backed human approval where supported and fail closed otherwise. Retrieved mail follows the connected model provider policies; the append-only audit is not tamper-proof.

A Google Workspace MCP server that exposes 23 curated tools for Drive, Sheets, Calendar, Docs, and Gmail via the gws CLI.

An open-source IMAP/SMTP email MCP server with App Passwords that auto-discovers Gmail, Outlook, Yahoo, iCloud and offers search, read, send, reply, and forward tools.

A fast MCP server for Apple Mail that enhances email fetching speed and offers various email management tools.

A unified server for managing email across Gmail, Outlook, iCloud, and generic IMAP/SMTP with 24 tools for search, send, organize, and batch-manage emails.

An IMAP/SMTP email MCP server with 42 tools for managing emails across multiple accounts.