Claude Cowork and your email: how to reach several mailboxes with one connector

Claude Cowork reaches the remote connectors of your Claude account, so the simplest way to give it access to several mailboxes is to connect them once in Fezola and add Fezola as a single custom connector. One connector then covers Gmail, Outlook.com, iCloud, Yahoo, OVH, IONOS, Gandi or any IMAP mailbox, plus Google Chat and Telegram in read-only mode. As of November 2026, we have not tested every screen in Cowork ourselves: what follows is what Anthropic documents, plus what Fezola does on its side.

What Anthropic says about Cowork and connectors

According to the help center article on custom connectors:

• Custom connectors using remote MCP are available in Cowork on Free, Pro, Max, Ultra, Team and Enterprise plans. Free users are limited to one custom connector.
• Remote connectors are configured and brokered through your Claude account. The connection to the server comes from Anthropic's servers, not from your machine.
• Local servers set up in claude_desktop_config.json are not available in Cowork or claude.ai.
• Connectors are enabled per conversation with the plus button, then Connectors.
• Anthropic does not verify custom connectors: add only servers you trust.

Two consequences for email. A local IMAP server running on your laptop is not the right tool for Cowork, because it does not reach it. And one hosted connector is easier to manage than one per mailbox, especially on a free plan limited to one custom connector.

Setup

1. Create a free Fezola account and add your mailboxes in Sources, giving each a short name such as "Personal" or "Work".
2. Add Fezola to Claude. Customize, Connectors, + Add, Add custom connector, name it Fezola and paste https://api.fezola.com/mcp. On Team and Enterprise, an Owner adds it under Organization settings, Connectors, then members connect individually. Details in how to add a custom connector to Claude.
3. Approve the access on the Fezola consent screen.
4. Enable Fezola in your Cowork conversation with the plus button, then Connectors.

What you can ask Cowork

• "Search all my mailboxes for the invoice from the plumber and tell me which account it is in."
• "Summarize what arrived overnight in my work and personal inboxes, group by urgency."
• "Draft a reply to the last email from my accountant, from the right address."

Every search result carries its account name and address, so you always know where a message lives. Attachments in PDF, Word, text and image formats can be read. For the search itself, see search all your inboxes with Claude.

What Cowork cannot do through Fezola

• It does not send by default. Replies are saved as drafts in the mailbox that received the original, with that address as the sender. You review and send them yourself.
• Email is untrusted input. A message can contain instructions aimed at the model. While sending stays off, a hijacked session cannot mail anyone. Read is it safe to give an AI access to your email?.
• You can cut the access. Remove the connector in Claude, or revoke the assistant in Fezola.

If you switch Claude accounts

Connectors belong to a Claude account. If you move between accounts, you reconnect each connector. With Fezola you add one connector per account and your mailboxes follow: see one connector, every Claude account.

What's next

Fezola's direction is simple: if a tool only has an API and no MCP server, we build the connector. Today the ones available are mail, Google Chat and Telegram, with Outlook.com supported and Google Calendar in beta. Others are being prepared and have no release date.