How to connect your Gandi mailbox to Claude (and ChatGPT Business)

To use a Gandi mailbox in Claude or ChatGPT, you connect it over IMAP through an MCP server, then add that server to your assistant. With Fezola, you choose Gandi in the list (the server mail.gandi.net, ports 993 and 465, is filled in), type your mailbox password, and paste one URL into Claude or ChatGPT. It takes about two minutes and nothing has to be installed. ChatGPT accepts custom MCP servers on Business and Enterprise/Edu plans (Pro read-only), so Claude is the easiest way in; see how to add an MCP server to ChatGPT.

Why Gandi mail needs a connector

Gandi hosts the email of many developers, small businesses and associations on their own domain (you@your-domain.com). As of November 2026, the built-in mail connectors of Claude and ChatGPT target large providers such as Gmail. A Gandi mailbox is a standard IMAP mailbox, so the assistant needs an IMAP MCP server to reach it.

Fezola is a hosted one: you add the mailbox once on the Fezola website, and your assistant signs in to Fezola with OAuth. The mailbox password never goes through the assistant's settings or the chat.

The Gandi settings

In Fezola, choose	Incoming (IMAP)	Outgoing (SMTP)	Login
Gandi	mail.gandi.net, port 993, TLS	mail.gandi.net, port 465, TLS	full email address

These match Gandi's own documentation, which also allows SMTP on port 587 with STARTTLS. If Gandi shows you different values, use those: in Fezola every server and port can be changed under "Server settings".

Gandi does not use app passwords: the login is the full address and the password is the one of the mailbox (the one you use in Gandi webmail), not the password of your Gandi account.

Setup in four steps

1. Create a free Fezola account and open Sources.
2. Add the mailbox: choose Gandi, enter the address and the mailbox password, and give it a short name such as "Work". Your assistant uses that name to say where each message comes from. Click "Test the connection": Fezola checks incoming (IMAP) and outgoing (SMTP) mail.
3. Add Fezola to your assistant. In Claude: Customize, Connectors, + Add, Add custom connector, name it Fezola and paste https://api.fezola.com/mcp. In ChatGPT on the web: Plugins, the plus button, Add custom MCP server, paste the same URL and choose OAuth (availability depends on your plan, see how to add an MCP server to ChatGPT).
4. Approve the access on the Fezola consent screen, then ask your first question.

What you can ask

• "What did clients write this week? Group by urgency."
• "Find the last invoice from my registrar and summarize the PDF."
• "Draft a reply to the last email from Martin, from my Gandi address."
• "Search my Gandi mailbox and my Gmail for the flight confirmation."

Attachments are readable (PDF, Word, text and images), and when several mailboxes are connected, every result names its account.

What the assistant cannot do

• It does not send by default. Replies are saved as drafts in the Gandi mailbox that received the original message, with that address as the sender. You review and send them yourself, unless you switch on direct sending for that mailbox.
• It does not keep a copy of your mail. Messages are read live from Gandi when the assistant asks.
• It only acts when asked. Archiving, moving or flagging happens on request.

For the security side, read is it safe to connect your email to an AI?. The setup is the same as for OVH, and other hosts work alike: see the IMAP MCP server guide.

Common errors

• "Username or password rejected": check that you use the full address as login and the password of the mailbox, not your Gandi account password.
• Server unreachable: make sure the server is mail.gandi.net with ports 993 (IMAP) and 465 (SMTP).
• Status "Error" in your assistant: ask it to test the connection. Fezola returns a plain explanation of what failed.