Proton Mail IMAP: can you connect Proton Mail to Claude or ChatGPT?

You cannot connect a Proton Mail mailbox to Claude or ChatGPT through Fezola today, because Proton Mail only offers IMAP through Proton Mail Bridge, an app that runs on your own computer, and Fezola cannot reach it. This article explains why, so you do not lose time on a setup that cannot work. Facts about Proton come from Proton's official IMAP, SMTP and POP3 page, read on 14 November 2026: Proton can change them, so check the page.

What Proton says

• IMAP only through Bridge. Proton's page says Bridge manages the incoming and outgoing server connections for you, and that it works with any client that supports IMAP and SMTP, such as Outlook, Thunderbird and Apple Mail. The page does not describe a direct IMAP server.
• A paid plan. Bridge is currently available only with a paid Proton Mail plan.
• No POP3. Proton says it does not offer POP3 support.

Why Fezola cannot use it

Bridge runs on your computer and exposes a local address that only your computer can reach. Fezola is a hosted connector: its servers make the connection to your mailbox. For security, they refuse local and private network addresses, so that an address typed by a user can never point at Fezola's own internal network. A Bridge on your machine is therefore out of reach, and Fezola does not have a Proton Mail preset.

What you can do

• Keep Proton Mail for what it does. If you also use Gmail, Outlook, iCloud or another IMAP provider, connect those: see Claude email integration and search all your inboxes with Claude.
• For other providers, see Orange, Hostinger, connect a custom domain email and the IMAP connector page.

If a direct way to connect Proton Mail appears, it will show up on the connectors page. We prefer to tell you what does not work today than to promise a setup that fails.