Connect Yahoo Mail to Claude and ChatGPT
Multi Mail connects Yahoo mailboxes to Claude and ChatGPT with an app password, never your Yahoo password.
For yahoo.com, ymail.com and rocketmail.com addresses, and other domains whose mail Yahoo Mail's own servers receive.
The AI apps' own connectors
Multi Mail's other provider pages name what the AI apps' own connectors do for their providers: Gmail, Outlook and Hotmail, Microsoft 365, iCloud, Fastmail, Inkbox.
Connect it
At YahooYahoo makes an app password only in a browser you have signed in to Yahoo with for several days in a row - never in a private window.
The link opens Yahoo in a new tab.
- 1
Sign in to your Yahoo Account Security page at login.yahoo.com.
- 2
Under External connections, choose Create app password.
- 3
Name it Lumman, choose Generate password and copy it.
Yahoo shows it once - leave that page open until Lumman asks for it.
Add it to
- 4Add to ClaudeOpens claude.ai - press Connect there.
- 5
Sign in, add your Yahoo mailbox and approve Claude in the window Claude opens - choose Another mailbox, type the address and paste the app password when it asks
- 6
Ask Claude about your mail
- 4
Run in Claude Code
/plugin marketplace add lumman-lab/multi-mail/plugin install multi-mail@multi-mailRun the first, then the second.
- 5
Sign in, add your Yahoo mailbox and approve Claude Code on the Lumman page your browser opens - choose Another mailbox, type the address and paste the app password when it asks. If none opens, run /mcp and choose multi-mail.
- 6
Ask, or run
/multi-mail:triage
Works fully on ChatGPT Business, Enterprise and Edu.
- 4
Copy the address
- 5Open 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.
- 6
Install it, then sign in, add your Yahoo mailbox and approve on the Lumman page it opens - choose Another mailbox, type the address and paste the app password when it asks. In a chat, type @ and choose Multi Mail.
- 4
Add to
~/.cursor/mcp.json - 5
Sign in, add your Yahoo mailbox and approve Cursor on the Lumman page Cursor opens - choose Another mailbox, type the address and paste the app 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.
Reach and limits
- Search and read it together with every other mailbox you add.
- Draft, reply, forward and send from it.
- Archive, bin and file its mail, and clean up its inbox by sender, putting back what a clean-up moved.
- Multi Mail reaches no filters or vacation responder at Yahoo.
- Yahoo's default view shows a mail app only each folder's newest messages. Multi Mail reads that view, and says which folder holds more.
If it refuses
- Yahoo refused this password. Use an app password, not your Yahoo password - made in a browser signed in to Yahoo for several days, never a private window - and check the address.
- Multi Mail does not connect mail Yahoo keeps for another company, such as Rogers or Yahoo's business mail. Nothing was sent.
Connection
- Receiving
- imap.mail.yahoo.com, port 993
- Sending
- smtp.mail.yahoo.com, port 587
- Login
- Your whole address and the app password
- Check
- Both servers accept the password before the mailbox is added
Your data
- Stored
- The app 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 delete it on your Yahoo Account Security page under External connections.
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.