Send & Receive Issues

How to Fix Microsoft Word Mail Merge Emails Not Sending

Phi Hung Vo Oct 21, 2026 870 views

Question details

Users are unable to confirm if a Microsoft Word bulk email merge was sent because the messages do not appear in the Sent Items folder and no test emails are received.

How to Fix Microsoft Word Mail Merge Emails Not Sending

Product: Microsoft Word and Outlook
Device & OS: Windows
Scenario: Executing a bulk email mail merge from Microsoft Word.
Observed behavior: The mail merge process appears to complete normally in Word, but the outgoing messages never arrive at their destination and fail to show up in the Sent Items folder.

Before you start

Ensure that your computer has an active internet connection and verify that you have full access to the email account you intend to use for sending the bulk messages.

Solution 1Recommended

Use the Desktop Version of Microsoft Outlook

Microsoft Word requires the desktop version of Outlook to route and send mail merges properly. Web-based Outlook will not process these requests.

When performing an email mail merge, Word relies heavily on a local MAPI client to handle the outbound messages. If you only have Outlook on the web open, the merge cannot process the outgoing emails, leaving them unsent.

Launch Outlook Desktop

Open the Microsoft Outlook desktop application on your Windows computer.

Sign In to Your Profile

Ensure you are signed into the correct Outlook profile and mailbox associated with the email address you want to send the merge from.

Rerun the Mail Merge

Return to your Microsoft Word document, navigate to the Mailings tab, and execute the 'Finish & Merge' process again. The messages will now route through the desktop app and appear in your Sent Items folder.

Use the Desktop Version of Microsoft Outlook

Verification: To confirm the emails are sending, keep your Outlook desktop app open and watch the Outbox and Sent Items folders as the merge processes.

Solution 2

Repair the Microsoft Office Installation

If Outlook desktop is installed but mail options are missing or the merge still fails, repairing the Office suite can fix broken dependencies between Word and Outlook.

Free Microsoft Office alternative

Try WPS Office for Seamless Document Creation

If you are tired of complex troubleshooting and software dependency issues when trying to complete simple tasks like a mail merge, WPS Office offers a powerful, lightweight, and hassle-free alternative.

1. Download WPS Office: Visit the official WPS website and download the free installation package for Windows.
2. Install and Launch: Run the installer and launch WPS Writer to explore the built-in Mailings tab.
3. Open Existing Documents: Open your existing .docx files in WPS Writer instantly, with all your original formatting perfectly preserved.

Fully compatible with Microsoft Word (.docx), Excel (.xlsx), and PowerPoint (.pptx) formats.Built-in robust Mail Merge functionality that is easy to set up and execute.Lightweight installation that runs smoothly without resource-heavy background services.Familiar tabbed user interface makes switching incredibly easy and intuitive.

microsoft office alternative - wps office

Frequently Asked Questions

Can I use a web-based email service like Gmail for a Word mail merge?

Microsoft Word's native mail merge requires a MAPI-compliant desktop email client like Outlook. To use Gmail or other webmail providers, you must first add and configure that email account within the Outlook desktop application.

Why are my Word mail merge emails stuck in the Outlook Outbox?

This typically occurs if Outlook is in 'Offline' mode, or if the email server requires authentication that hasn't been completed. Ensure Outlook is connected to the server by checking the Send/Receive tab and verifying your password is up to date.

How can I test a mail merge before sending it to hundreds of people?

Before completing the merge, use the 'Preview Results' feature in the Mailings tab to verify formatting. It is highly recommended to do a test merge by selecting a single recipient (or your own email address) under 'Finish & Merge' to confirm successful delivery.

Will a mail merge work with the Mac version of Microsoft Word?

Yes, but similar to Windows, Word for Mac requires the Apple Mail application or the desktop version of Outlook for Mac to act as the default email client to route and send the messages.

Outlook & Email Problems