If you rely on mail merge to send personalized bulk emails, the transition to the new Outlook for Windows can be confusing. The classic Mail Merge button no longer appears in the same place, and some familiar features have moved or changed. This article explains exactly where to find mail merge in the new Outlook, what still works the same, and what key differences you need to know before you start a merge.
Mail merge in the new Outlook is not a built-in button. Instead, you must start the merge from Microsoft Word using the existing Word Mail Merge feature. The new Outlook acts as a delivery channel once Word prepares the message. Understanding this workflow is essential to avoid searching for a button that no longer exists inside Outlook itself.
This guide covers the exact steps to launch mail merge from Word, how to connect it to the new Outlook, and the specific differences in behavior, attachment handling, and preview options compared to classic Outlook.
Key Takeaways: Mail Merge in New Outlook
- Word > Mailings > Start Mail Merge > Email Messages: This is the only way to start a mail merge that sends through the new Outlook. There is no mail merge button inside Outlook itself.
- File > Options > Mail > Compose messages in this format > HTML: Set Word to use HTML format so the new Outlook correctly renders fonts, images, and formatting in merged messages.
- Word > Finish & Merge > Send Email Messages > To field > Email_Address: You must map the recipient email address field exactly. The new Outlook uses the default mail profile without asking you to choose an account.
How Mail Merge Works in the New Outlook
The new Outlook for Windows does not include a mail merge command on its ribbon or menu. Mail merge is a Word feature that has always been part of Microsoft Office. In classic Outlook, a button inside Outlook launched Word and passed the merge settings automatically. In the new Outlook, that bridge button is gone. You must open Word directly, set up the merge there, and choose the new Outlook as the send method.
The new Outlook uses a single default mail profile. When you run a merge from Word and select the new Outlook as the destination, Word sends each personalized message through the default email account configured in the new Outlook. You cannot select a different sending account during the merge process. This is a key change from classic Outlook where you could pick from multiple profiles or accounts mid-merge.
The merge itself still works the same way. Word pulls recipient data from an Excel spreadsheet, Outlook Contacts, or an Access database. It populates merge fields such as First_Name, Last_Name, and custom fields into a Word template. Each record generates a separate email message. Word sends these messages one at a time through the new Outlook.
Prerequisites for Mail Merge in New Outlook
Before you start, confirm you have the following items ready:
- Microsoft Word installed on the same computer as the new Outlook. Word 2019, Word 2021, or Microsoft 365 Word all work.
- A data source file such as an Excel workbook or a comma-separated values file. The first row must contain column headers like Email_Address, First_Name, Last_Name.
- The new Outlook must be set as your default email client. Go to Windows Settings > Apps > Default Apps and set Email to Outlook (new).
- Your email account must be configured and working in the new Outlook. Send a test message first.
Steps to Run a Mail Merge from Word to the New Outlook
- Open Word and create a new blank document
This document will become your email template. Do not use an existing letter or document unless you want to reuse its formatting. - Go to Mailings > Start Mail Merge > Email Messages
Selecting Email Messages tells Word to create individual emails instead of letters or labels. This step is required for the merge to send through Outlook. - Select Recipients > Use an Existing List
Browse to your Excel workbook or other data source. Select the sheet that contains your recipient data. Word displays the Mail Merge Recipients dialog where you can filter or sort the list. - Insert merge fields into the document
Type the static parts of your email message. Click Mailings > Insert Merge Field and choose fields such as <>, < >, or < >. Place the < > field in the document body as a placeholder. Word will use this field only if you do not set the To field separately later. - Set the email format to HTML
Click File > Options > Mail. Under Compose messages, set Compose messages in this format to HTML. Click OK. This ensures that fonts, colors, and images in your Word template transfer correctly to the email messages. - Click Finish & Merge > Send Email Messages
In the Mailings tab, click Finish & Merge and then Send Email Messages. A dialog box appears. - Configure the Send Email Messages dialog
Set the To field to the column name that contains email addresses, for example Email_Address. Set Subject line to your desired subject. Under Mail format, select HTML. Under Send records, choose All or a specific range. Click OK. - Allow Word to send the messages
Word opens the new Outlook and sends each message individually. A progress bar appears. Do not close Word or Outlook during this process. Wait until Word reports that the merge is complete.
Key Differences Between Classic Outlook and New Outlook Mail Merge
| Item | Classic Outlook | New Outlook |
|---|---|---|
| Mail merge button location | Inside Outlook under Mailings or Add-ins | Not present. Must start from Word |
| Account selection during merge | Can choose from multiple profiles or accounts | Uses the default account only |
| Attachment support | Attachments are embedded in the merge template | Attachments are not supported. Word cannot attach files during a merge to the new Outlook |
| Preview before sending | Preview Individual Letters button shows each record | Preview Results button in Word works but does not show the final email in Outlook |
| Send method | Word sends through Outlook MAPI directly | Word sends through the new Outlook MAPI provider |
Common Issues and Workarounds
Mail Merge Button Is Missing in the New Outlook
The new Outlook does not have a mail merge command on the ribbon. Do not search for it. Open Word separately and follow the steps above. If you want a quick launch, pin Word to your taskbar. There is no way to add a mail merge button to the new Outlook ribbon.
Word Cannot Find the New Outlook as a Send Option
If the Send Email Messages dialog does not send or shows an error, the new Outlook may not be set as the default email client. Open Windows Settings > Apps > Default Apps. Scroll to Email and select Outlook (new). Restart Word and try the merge again.
Attachments Do Not Appear in the Merged Emails
The new Outlook does not support attachments generated by Word mail merge. To send attachments, you must attach them manually after the merge or use a third-party add-in that supports the new Outlook. Alternatively, include a download link in the email body instead of an attachment.
Recipient Email Addresses Are Missing or Incorrect
Check that your data source has a column named exactly as you typed in the To field of the Send Email Messages dialog. The column name is case-sensitive. If the column is named Email, type Email. If the column is named E-mail Address, type that exactly. Word cannot guess the column.
Conclusion
You can still run a mail merge with the new Outlook by starting from Word. Open Word, go to Mailings > Start Mail Merge > Email Messages, and connect your data source. The new Outlook handles the sending step automatically using your default email account. Remember that attachments are not supported and you cannot choose a different sending account during the merge. For advanced merges that require attachments or multiple accounts, consider keeping classic Outlook installed or using a dedicated email marketing tool.