"Proton Mail" matching MCP connectors:

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

Agent-run cold-email infra: 24 MCP tools, live sending, free sandbox. $99/mo, concierge go-live.

Verify US & international addresses and send physical mail (postcards, letters, checks) via Lob.

Send transactional emails for AI agents via SMTP. Templates included.

The first MCP server for physical mail: send postcards and letters, manage lists and campaigns.

Goal-directed email outreach: research, draft, send, triage replies. Real data, never fabricated.

Manage Scribe email signatures: templates, teammates, smart fields and campaigns, via OAuth.

An MCP server to send personalised direct mail.

Run personalised outreach campaigns and manage conversations using a virtual computer equipped with email capabilities, research tools, and workflow automation. Email Outreach by OpenHelm enables your agent to carry out work such as: • Prospect research • Personalised outbound email campaigns • Lead qualification • Follow-up sequences • Inbox monitoring and response handling

Full email marketing platform: inbox, campaigns, contacts, templates, and analytics via MCP.