"How to Use or Manage Knowledge Base in Feishu" matching MCP connectors:

Teaches AI to write HTML email that renders in Outlook, Gmail, and Apple Mail. 19 rules, 6 comps.

Manage Subscribers, Broadcasts, Sequences, Automations, and reporting in Mailrith.

Let ChatGPT, Claude & Cursor use your Mac: email, calendar, iMessage, Teams, files. Local, free.

Mailchimp MCP Pack — manage audiences, campaigns, and members via Mailchimp Marketing API.

Render HTML/.eml emails in real Gmail, Outlook & Yahoo web clients and screenshot them

Verify email deliverability & find business emails (single or bulk) via the Verifox API.

Internet identity for AI agents: register or broker domains, email, DNS - pay by card or USDC.

AI-powered email outreach platform — manage contacts, campaigns, sequences, and send follow-ups with deliverability tracking

Manage lists, contacts and campaigns, and read campaign performance reports on EmailOctopus.

Manage Loops contacts, mailing lists, and transactional/event emails.

Email for AI agents: send mail, manage contacts, automations & webhooks. Zero-DNS first send.

Email infrastructure for AI agents — send, receive, search, and reply to email over MCP.

AI-powered virtual assistant that connects to Gmail, Outlook, Slack, Salesforce, HubSpot, Google Calendar, DocuSign, QuickBooks, and 20+ other services. Manage your entire professional life through a single Claude conversation — email, calendar, CRM, documents, travel, expenses, and more.

Connect any email mailbox (Gmail, Outlook, IMAP/SMTP, OVH, LWS, Infomaniak...) to Claude, ChatGPT & any MCP client. Read, send, reply, schedule and search emails. No code, OAuth2, EU-hosted (GDPR). 15 email tools.

Shipmail MCP server for AI agent custom-domain email inboxes with REST API and webhooks.

Phone, SMS & email for AI agents. One remote MCP server (Streamable HTTP, OAuth or API-key auth, no local install) exposing call, sms, email, and event tools; also usable via CLI, Python SDK, and OpenAPI. Self-hostable, AGPLv3.

Open-source MCP server that gives AI agents access to real email and calendar in one npm install. Solves the problem of AI agents hitting a wall when they need your inbox.

Apollo connects your sales data and outreach tools directly to your agent . Ask it to find leads, look up a company, write and send emails, or check how a campaign is performing. All from a conversation, without opening another tab.

Your AI agent just got a marketing team. SendPulse MCP Server provides full access to the SendPulse marketing platform — email campaigns, CRM, chatbots, SMTP, and online courses. 134 methods across 5 modules.

Heldly reads your Google Calendar directly, places tentative holds on every host's calendar, and emails the invitee a one-click picker. The moment the invitee picks, Heldly confirms the chosen slot and deletes the siblings across every host's calendar in the same request. No reusable booking page, no in-app form, no calendar cleanup.