Connect it in two minutes
Add the Nilyo app in ChatGPT, or enable developer mode and add a connector with the URL https://nilyo.com/mcp and OAuth. Then connect the mailbox: give the address and the password and the servers are detected from the address — you normally never type a host or a port. Only if detection fails are you asked for them, and the authoritative place to copy them from is the account settings of the mail client you already use.
IMAP access has to be switched on first
In GMX, access from an external mail program is a setting you enable in the account settings — until you do, any client, ours included, is refused with a credentials error that looks like a wrong password and is not. Once enabled, if you have two-factor authentication on, an app-specific password generated in the security settings is expected instead of the account password. The same account may exist on gmx.com, gmx.net or gmx.fr depending on where it was created; connect the address as you actually use it and let detection resolve the servers.
What it is actually good for here
Free mailboxes carry more real correspondence than people admit — a side business, a landlord, an association treasurer. The assistant reads the threads and surfaces what expects an answer, and because the tools are the same as for a company mailbox, that address sits in the same question as the others.
“What arrived since yesterday that needs an answer from me?”
“Find the thread where we agreed the delivery date and quote the message.”
A free mailbox is still a real mailbox
Consumer mailboxes are exactly what most integrations dismiss, and they are where a lot of real correspondence lives — a side business, a landlord, an association. The tools are the same as for a company mailbox, so it sits beside the others in one question.
When it stops working
Two causes cover nearly everything. The password is refused after it worked: an application password was revoked, or the mailbox password was changed — generate or update it and reconnect the same mailbox rather than adding a second one. The agent suddenly sees nothing: the session expired, and the card in the answer carries the reconnection link. A mailbox that moved host is reconnected with the new servers, not re-added, so anything referring to it keeps working.
Common questions
Can ChatGPT read a GMX mailbox?
Yes, over IMAP, once external access is enabled in the GMX account settings. Until then any client is refused with what looks like a password error.
Why does my password not work?
Either IMAP access is still disabled, or two-factor is on and an app-specific password is expected instead of the account password.
Does gmx.fr work as well as gmx.com?
Yes. Connect the address the way you actually use it and the servers are detected from it.
How Email works with Nilyo
Connection. Gmail and Microsoft 365/Outlook through their official sign-in (the “Unipile” name appears on the consent screen: Unipile SAS operates the connection). Any other mailbox through IMAP/SMTP: OVH, Zoho, iCloud, IONOS, Infomaniak, Fastmail, Yahoo, GMX and self-hosted servers.
What your agent can do. Folders and labels, listing and searching messages, reading with attachments, drafts, sending and true replies, moving and labelling, contacts on Gmail and Microsoft.
Pacing and safety. No local budget; provider limits apply. IMAP mailboxes are read live, so listings are paged (50 messages max per page).
- “How many emails today” uses the folder counts of the mailbox; “today” is a date filter, never a guess.
- On IMAP a message id changes after a move; Nilyo returns the new id so the agent keeps working on the right message.
All Email guides
Related guides
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