> ## Documentation Index
> Fetch the complete documentation index at: https://docs.grunt.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Outlook send issues

> Fix Grunt Send behavior when Windows uses new Outlook and attachment handoff fails

Grunt's **Send** feature relies on the Windows mail handoff used by Outlook. The legacy support guidance notes a specific limitation in **Outlook (new)** on Windows.

## What the problem looks like

When you use **Send** in Grunt:

* An email draft appears to be generated
* The attachment may be present
* The recipient never receives the email
* The email does not appear in **Sent Items**
* No clear error message is shown

## Why it happens

According to the legacy support article, **Outlook (new)** does not support the same attachment-based email generation flow that Grunt depends on.

Windows therefore needs the fallback path through **Outlook (classic)** for attachment-based sends.

## Fix on Windows 10

1. Open **Outlook (classic)** once.
2. Close it again.
3. Open **Settings** > **Apps** > **Default apps** > **Choose default apps by protocol**.
4. Find `MAILTO`.
5. If it currently points to **Outlook (new)**, switch it to **Outlook (classic)**.
6. Then switch it back to **Outlook (new)**.

This repair step helps Windows restore the correct fallback behavior.

## Fix on Windows 11

1. Open **Outlook (classic)** once.
2. Close it again.
3. Open **Settings** > **Apps** > **Default apps**.
4. Search for `MAILTO`.
5. Open the `URL:MailTo Protocol` entry.
6. If it currently points to **Outlook (new)**, switch it to **Outlook (classic)**.
7. Then switch it back to **Outlook (new)**.

## Expected result

After this change:

* Emails with attachments created by Grunt should open through **Outlook (classic)**
* Regular mail links without attachments can still open in **Outlook (new)**

If email handoff is still blocked in your environment, export the file manually and attach it yourself from Outlook.