"An overview of REST (Representational State Transfer)" matching MCP servers:

MCP server for Yahoo Mail over IMAP+SMTP that enables AI assistants to manage emails fully—listing, reading, searching, threading, flagging, moving, archiving, handling attachments, and sending/reply/forward/draft—using an app-specific password.

Enables MCP clients to exchange an MCP-audience token for a Microsoft Graph token and call Graph as the signed-in user, with tools for identity verification and recent mail access.

Enables coding agents to research and score leads against industry ICP templates, draft cold emails, and gate every draft through CAN-SPAM and deliverability checks before a human approves it. Nothing is sent by default, and each step is recorded in an append-only audit log showing why a lead was contacted.

An enterprise-grade MCP server that provides production-ready IMAP email integration with advanced reliability features, comprehensive monitoring, and secure account management.

Domain Name MCS server from OSIR, an ICANN-accredited registrar: 105 tools and 11 prompts to search, register, renew, transfer, and manage domains, DNS, VPS, email, and websites from Claude, ChatGPT, Cursor, or any MCP client

This foundation-only service is intended to enable narrowly bounded, typed operations over Shayona business data, starting with an approval-bound, redacted-preview workflow for emailing customer service credentials. It is designed to keep usernames and decrypted passwords out of MCP results, previews, errors, logs, traces, and approval state.

MCP server that acts as an email gateway for Gmail and Microsoft 365, enabling AI agents to send and read emails via MCP tools, with SMTP/IMAP and REST APIs for email sequencing and automation.

Enables authenticated management of email, drafts, sending, domains, contacts, templates, campaigns, workflows, and webhooks through typed MCP tools backed by a REST API.

An MCP server that connects AI assistants to Zoho Mail, enabling reading, searching, sending, scheduling, organizing, and downloading emails through the official Zoho Mail REST API.

MCP server that sends mail over SMTP, gated behind an allowlist and a human confirmation

Enables read-only access to a single Gmail mailbox, listing emails within a date range and retrieving full headers and body text of individual emails, with deep-link jump URLs for each result.

Enables verification of email address lists through a chosen third-party service (ZeroBounce, NeverBounce, MillionVerifier, BounceBan, or Reoon), returning one normalized row per address with verdict and role, free, and disposable flags. It protects credits by skipping malformed or duplicate addresses and stopping runs on invalid keys or exhausted balances.

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

An MCP server that checks SPF, DKIM, DMARC, and MX records for a domain, returning a health verdict and specific DNS fixes to improve email deliverability.

Enables AI agents to read and send email, handle attachments and manage calendar invitations through their own IMAP/SMTP mailboxes, with per-mailbox sender and recipient allow lists and automatic HTML-to-Markdown conversion. It runs as a single self-hosted Docker container, exposing the same tools over MCP and REST.

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.

Enables MCP clients to read and search Proton Mail and create draft-only emails with attachments through the local Proton Mail Bridge, while requiring out-of-band human approval before a draft can be committed.

An MCP server that exposes a verify_email tool for checking email syntax, disposable domains, and MX records, returning a structured validity result.

▎ Check an email before an AI agent sends it: send / ask a human / block — with machine reason codes and prompt-injection detection.

Giggal.ai is an email verification tool that runs a deep mailbox existence check on every address and verifies catch-all/accept-all and even SEG protected emails. Your bounce rate stays under 5%, and the 30% of every B2B list that other tools flag as "Risky" becomes deliverable again.

Local-first Microsoft Outlook MCP server: a single Go binary that manages calendar events and mail through the Microsoft Graph API over stdio, with tokens stored in the OS keychain and no Entra ID app registration required. Exposes four aggregate tools (calendar, mail, account, system) dispatched by an operation verb, with multi-account support and read-only and mail-gating modes.

Gives an AI assistant read- and draft-only access to a single personal Microsoft mailbox, letting it search, list and read mail, browse folders, save attachments to a jailed directory, and create new or reply drafts. It requests no send scope, so mail can never be sent, deleted, moved or marked, and calendar, contacts and files are untouched.

Enables an AI agent to send files end-to-end encrypted, encrypting on the user's computer and keeping the download link key, password, and login away from the model.

Renders markdown into email-safe HTML that holds up in Outlook and Gmail, lints drafts for deliverability problems, and returns a live preview link. Also serves the emailmd syntax reference so an assistant can look up directives on demand.

Sift enables AI assistants to search all of Apple Mail locally at high speed, including bodies and PDFs, returning collapsed threads with quoted replies removed, without sending data anywhere.

An MCP server for Microsoft Graph, exposing 60 tools across calendar, email, meetings, Teams chat, files, people, directory, tasks, and OneNote over stdio or Streamable HTTP.

MCP server for disposable email. Gives an assistant its own throwaway inbox, then hands back the confirmation code out of the message that arrives.

An MCP server that enables AI assistants to read and search Proton Mail messages through a locally running Proton Mail Bridge. It provides tools like list_folders, list_messages, search_messages, get_message, and get_attachment.

Email MCP server for any IMAP mailbox, Outlook and Microsoft 365 included through browser sign-in. Search, read and draft with every message fenced as untrusted input, warnings for hidden text, lookalike letters and injected instructions, and sending locked to an allowlist.

An MCP server that provides programmatic access to Apple Mail, enabling AI assistants like Claude to read, send, search, and manage emails on macOS.