Connect Codex to your email through Mailopoly

This page is about OpenAI's Codex — the CLI, the desktop app and the IDE extension, which people also write as codex cli or openai codex. It is not about the ChatGPT chat itself, which has its own guide at Connect your email to ChatGPT.

Does Codex support Gmail without Mailopoly?

In the desktop app, yes. Codex can use ChatGPT's Gmail and Outlook Email plugins — search, read threads, draft, organise and triage — when you run Codex inside the ChatGPT desktop app with a ChatGPT login. They are OpenAI-hosted, so they aren't available under API-key authentication, and the IDE extension doesn't support plugins at all. Each reaches one account of one provider at a time.

Mailopoly is the route that works in the CLI and the IDE extension as well as the app, covers Yahoo, iCloud and IMAP alongside Gmail and Outlook, puts every account in one question, and hands Codex mail that is already filtered and summarised with invoices, events and deliveries extracted. Reading, making changes and sending are separate grants you can revoke.

Connect Codex to your email in three steps

What Codex can do with your email through Mailopoly

• Search every account in one question — Gmail, Outlook, Yahoo, iCloud and IMAP together, or one account by name — by sender, date, topic or the half-remembered phrase somewhere in the body.
• Work from the Cleanbox — your personal, non-promotional mail already separated from newsletters, promotions and automated noise, so a summary is a summary of what matters.
• Read summaries, not raw messages — every email arrives already summarised, with invoices, events and deliveries extracted with their amounts, dates and status.
• Keep My Day — see tasks and commitments pulled from every inbox, add tasks and reminders, tick things off.
• Draft and send — save drafts to Mailopoly for you to review, or with the send permission send from whichever connected address fits the conversation, or from your @mly.life address.
• Know what things cost — look up an invoice, total the week's bills, see what your subscriptions add up to.
• Tidy up — label, file or clear mail in bulk, when you tell it to.
• Business channels too — add them to your plan and your Slack, Teams, WhatsApp, Instagram, Messenger and TikTok messages sit in the same connection, and replies go back out through the channel they arrived on.

Should you give an agent your email account at all?

The warnings you'll find are right about one thing: an agent that logs in to Gmail as you, with your password, on a machine you don't control, is a bad idea. Mailopoly doesn't work that way. Your Google and Microsoft accounts connect to Mailopoly through their own sign-in, and other providers through an app password you enter on Mailopoly's page — Codex never has a password in its hands and never logs in to your provider at all.

Codex connects to Mailopoly with a scoped OAuth sign-in. Reading, making changes and sending are separate grants, sending is flagged as a confirm-first action in the protocol itself, every tool call is audit-logged against your account, and you can revoke Codex from Settings → Security → Connected AI assistants in the Mailopoly app — access ends immediately. Mailopoly is independently security-assessed to CASA Tier 2 by TAC Security. If you want a hard line, give Codex reading only, or give it one of your @mly.life addresses to send from so nothing leaves under your name unless you say so. More on whether it's safe to give AI access to your email and the security page.

What goes wrong with Codex, and the fix

• `codex mcp login` opens nothing. Codex needs a browser to finish the OAuth sign-in. On a headless machine, sign in once from a desktop and copy ~/.codex/config.toml — tokens stay with Codex, not in the file.
• It worked in the app but not in a cloud task. Custom remote MCP servers are local-only in Codex; cloud tasks don't see them.
• It only reads mail when you prompt it. Codex acts within a turn. For Codex to be *messaged* by Mailopoly, and to message you when it's done, see the Codex agent guide — it covers the headless loop for unattended replies.
• It connected but the tools don't answer. Mailopoly's tools respond on an active subscription or trial. If the trial has lapsed, the connection stays but calls return nothing useful until the plan is active.
• It can read but won't draft or send. Those are separate permissions. Sign in again from Codex and tick making changes or sending — or check what it holds under Settings → Security → Connected AI assistants in Mailopoly.

Related: Codex on the Switchboard · Connect your email to ChatGPT · Email for AI agents · Is it safe to give AI access to your email?

Other connect guides

Email providers

• Gmail
• Outlook
• Yahoo Mail
• iCloud Mail
• AOL Mail
• Comcast Email
• Zoho Mail
• Yandex Mail
• GMX
• Fastmail
• IONOS
• QQ Mail
• Web.de
• one.com
• OVH
• 163 Mail
• Alibaba Cloud Mail
• Namecheap Private Email
• Hostinger Email
• STRATO
• Mail.ru
• Naver Mail
• Titan Email
• Seznam.cz
• GoDaddy Workspace Email
• AT&T Mail
• Aruba Mail
• Infomaniak Mail
• Orange Mail
• Libero Mail
• Mail.com
• BT Mail
• Any IMAP Mailbox

Messaging channels

• WhatsApp Business
• Slack
• Microsoft Teams
• Instagram
• Facebook Messenger
• TikTok
• X

Connect guides by assistant

• Connect your email to Claude
• Connect your email to ChatGPT
• Connect Grok Bot to your email
• Connect Claude Code to your email
• Connect Codex to your email
• Connect OpenClaw to your email
• Connect Cursor to your email
• Connect Gemini CLI to your email
• Connect GitHub Copilot to your email
• Connect Hermes Agent to your email
• Connect Devin to your email
• All connect guides
• Mailopoly MCP — every client
• Agent guides — every AI you run, one inbox
• Email for AI agents — your inbox, not a throwaway one
• Security at Mailopoly
• Is it safe to give AI access to your email?
• The unified inbox: email, apps and agents