Another mailbox
Other mailboxes that mail apps reach over IMAP connect to Multi Mail with their address and password.
Multi Mail finds GMX, WEB.DE, mail.com, Zoho, GoDaddy, Titan, Namecheap, Hostinger, IONOS and OVHcloud from the address alone, at their own domains or yours. Any other mail server is found from your domain, or from the settings you type.
Add it to
- 1Add to ClaudeOpens claude.ai - press Connect there.
- 2
Sign in, add your mailbox and approve Claude in the window Claude opens - choose Another mailbox, type the address and paste its password when it asks
- 3
Ask Claude about your mail
- 1
Run in Claude Code
/plugin marketplace add lumman-lab/multi-mail/plugin install multi-mail@multi-mailRun the first, then the second.
- 2
Sign in, add your mailbox and approve Claude Code on the Lumman page your browser opens - choose Another mailbox, type the address and paste its password when it asks. If none opens, run /mcp and choose multi-mail.
- 3
Ask, or run
/multi-mail:triage
Needs ChatGPT Pro, Business, Enterprise or Edu. Plus and Free cannot add it.
- 1
Copy the address
- 2Open ChatGPT plugins
Press +, choose Add custom MCP server, name it Multi Mail, paste the address, choose OAuth, tick the box and press Create as a plugin.
- 3
Install it, then sign in, add your mailbox and approve on the Lumman page it opens - choose Another mailbox, type the address and paste its password when it asks. In a chat, type @ and choose Multi Mail.
- 1
Add to
~/.cursor/mcp.json - 2
Sign in, add your mailbox and approve Cursor on the Lumman page Cursor opens - choose Another mailbox, type the address and paste its password when it asks
Streamable HTTP, OAuth 2.1 with dynamic client registration. No key or client id.
- VS Code
Run MCP: Add Server, choose HTTP, paste the address and name it multi-mail.
- Gemini CLI
gemini extensions install https://github.com/lumman-lab/multi-mailIts first call opens Lumman's sign-in; /mcp auth multi-mail opens it again.
- Antigravity
agy plugin install https://github.com/lumman-lab/multi-mailRun /mcp, open multi-mail_multi-mail and choose Authenticate; approve on the Lumman page, then paste the code Antigravity shows back into it.
Any number of mailboxes. 25 actions a day free, 1,000 a day on Standard for $50 a year or $5 a month, or 10,000 a day on Plus for $200 a year or $20 a month.
Limits
- Multi Mail reaches no filters or vacation responder on these mailboxes.
- The mail servers have to take an encrypted connection on port 993, 143, 465 or 587, at a public IPv4 address.
- Yahoo and AOL addresses connect only once Yahoo approves Lumman's access to their mail. Yandex and Mail.ru addresses do not connect.
Connection
- Mail servers
- Found from the address, or the ones you type
- Login
- Your whole address, or the username you type, and the mailbox's password or an app password
- Check
- Both servers accept the password before the mailbox is added
Your data
- Stored
- The password, encrypted under a key held outside the database
- No copy kept - read from the mailbox on each call
- Removing it
- Disconnecting deletes our copy of the password, which works until you change or delete it at the mail service.
Tools
- Offered
- 29 of the 35 - no settings_filters_list, settings_filters_create, settings_filters_update, settings_filters_delete, settings_get_vacation or settings_update_vacation
Everything else
Multi Mail's address, sign-in, limits and every tool: Multi Mail's technical details.