> For the complete documentation index, see [llms.txt](https://docs.n8n.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.n8n.io/integrations/builtin/app-nodes/n8n-nodes-base.gmail/common-issues.md).

# Common issues

Here are some common errors and issues with the [Gmail node](/integrations/builtin/app-nodes/n8n-nodes-base.gmail.md) and steps to resolve or troubleshoot them.

## Remove the n8n attribution from sent messages <a href="#remove-the-n8n-attribution-from-sent-messages" id="remove-the-n8n-attribution-from-sent-messages"></a>

If you're using the node to [send a message](/integrations/builtin/app-nodes/n8n-nodes-base.gmail/message-operations.md#send-a-message) or [reply to a message](/integrations/builtin/app-nodes/n8n-nodes-base.gmail/message-operations.md#reply-to-a-message), the node appends this statement to the end of the email:

> This email was sent automatically with n8n

To remove this attribution:

1. In the node's **Options** section, select **Add option**.
2. Select **Append n8n attribution**.
3. Turn the toggle off.

Refer to [Send options](/integrations/builtin/app-nodes/n8n-nodes-base.gmail/message-operations.md#send-options) and [Reply options](/integrations/builtin/app-nodes/n8n-nodes-base.gmail/message-operations.md#reply-options) for more information.

## Forbidden - perhaps check your credentials <a href="#forbidden-perhaps-check-your-credentials" id="forbidden-perhaps-check-your-credentials"></a>

This error displays next to certain dropdowns in the node, like the **Label Names or IDs** dropdown. The full text looks something like this:

```
There was a problem loading the parameter options from server: "Forbidden - perhaps check your credentials?"
```

The error most often displays when you're using a Google Service Account as the credential and the credential doesn't have **Impersonate a User** turned on.

Refer to [Google Service Account: Finish your n8n credential](/integrations/builtin/credentials/google/service-account.md#finish-your-n8n-credential) for more information.

## 401 unauthorized error <a href="#id-401-unauthorized-error" id="id-401-unauthorized-error"></a>

The full text of the error looks like this:

```
401 - {"error":"unauthorized_client","error_description":"Client is unauthorized to retrieve access tokens using this method, or client not authorized for any of the scopes requested."}
```

This error occurs when there's an issue with the credential you're using and its scopes or permissions.

To resolve:

1. For [OAuth2](/integrations/builtin/credentials/google/oauth-single-service.md) credentials, make sure you've enabled the Gmail API in **APIs & Services > Library**. Refer to [Google OAuth2 Single Service - Enable APIs](/integrations/builtin/credentials/google/oauth-single-service.md#enable-apis) for more information.
2. For [Service Account](/integrations/builtin/credentials/google/service-account.md) credentials:
   1. [Enable domain-wide delegation](/integrations/builtin/credentials/google/service-account.md#enable-domain-wide-delegation).
   2. Make sure you add the Gmail API as part of the domain-wide delegation configuration.

## Bad request - please check your parameters <a href="#bad-request-please-check-your-parameters" id="bad-request-please-check-your-parameters"></a>

This error most often occurs if you enter a Message ID, Thread ID, or Label ID that doesn't exist.

Try a **Get** operation with the ID to confirm it exists.