Fix Cannot Send Word Document by Email in Windows 11
Question details
The user is unable to send a Word document directly via email to new recipients on Windows 11, despite the feature working correctly on an iPhone.
- Product
- Microsoft Word
- Device & OS
- Windows 11
- Scenario
- Attempting to use the Send or Share command within Microsoft Word to send a document directly as an email attachment.
- Observed behavior
- The action fails because Windows 11 defaults to an email application (like New Outlook) that lacks the necessary MAPI integration with desktop Office applications.
Verify that you have a desktop email client installed on your computer, such as Microsoft Outlook Classic, rather than just relying on web-based email or lightweight Windows apps.
Set Outlook Classic as the Default Email App
Configure Windows 11 to use a MAPI-compliant email program like Outlook Classic, which integrates correctly with Microsoft Word's sharing commands.
Sending a document directly from Microsoft Word requires a MAPI-compliant default email program. The 'New Outlook' app on Windows 11 does not fully support this integration. You need to use Outlook Classic and ensure it is designated as your default mail app.
Click the Start menu and select 'Settings', or press the Windows key + I on your keyboard.
In the left sidebar, click on 'Apps', then select 'Default apps' from the list of options.
Scroll down or search for your current email app (like New Outlook or Windows Mail) and click on it to view its default file and link types.
Change the default application for 'MAILTO' and email-related protocols to the classic 'Outlook' app. Once changed, restart Microsoft Word and try sending the document again.
Switch to WPS Office for Hassle-Free Document Management
If you frequently encounter errors or compatibility issues with Microsoft Word and New Outlook, WPS Office offers a free, lightweight, and user-friendly alternative. It installs quickly on Windows 11 and makes editing and sharing files seamless.
- 1. Download WPS Office: Visit the official WPS website to download and install the free WPS Office suite on your Windows 11 PC.
- 2. Open Your Document: Launch WPS Writer and open your existing Word document without losing any formatting.
- 3. Share via Email: Click on the 'Menu' button, select 'Share', and choose 'Email' to quickly attach your file using your preferred email client.

Frequently Asked Questions
Why does sending a Word document work on my iPhone but not on Windows 11?
Mobile devices like the iPhone use specialized sharing menus that directly link apps to Apple Mail or other installed clients. Windows 11 relies on the MAPI protocol, which requires a compatible desktop email program (like Outlook Classic) to be installed and set as the default.
What does 'MAPI-compliant' mean in Microsoft Office?
MAPI (Messaging Application Programming Interface) is a Windows standard that allows different desktop applications to communicate. A MAPI-compliant email client can successfully receive attachment commands sent from programs like Microsoft Word or Excel.
Can I use webmail like Gmail or Yahoo to send Word documents directly from Word?
No, web-based email services running inside a browser are not MAPI-compliant desktop applications. To use Gmail or Yahoo, you must first save the Word document to your computer, open your webmail in a browser, and manually attach the file to a new message.




