"Speaking to Claude AI via Slack" matching MCP connectors:

Scan and fix email auth (SPF, DMARC, DKIM, MX, blacklists, expiry) + DNS checks. Validated fixes.

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

Capture receipts, scan Gmail, analyze spending, and create reviewed reports from AI assistants.

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

MCP server for Tomba email finder, verification, and contact enrichment API

Emailable MCP — wraps the Emailable email verification API (emailable.com)

Hunter.io MCP — wraps the Hunter.io email finder & verification API (hunter.io)

Findymail MCP — B2B email finder & reverse-email lookup (findymail.com)

could-have-been-email MCP — wraps StupidAPIs (requires X-API-Key)

ActiveCampaign MCP Pack — email marketing + CRM (API v3).

send-that-email MCP — wraps StupidAPIs (requires X-API-Key)

Klaviyo MCP Pack — wraps the Klaviyo API for email marketing

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

Gmail MCP Pack

Postmark MCP.

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

AI-powered email outreach platform — send campaigns with deliverability tracking.