Send & Receive Issues

How to Change the Sender Account for a Word Mail Merge in Outlook

Maira MehtabMaira Mehtab Nov 13, 2026 869 views

Question details

The user needs to change the sender account used by a Word mail merge so messages are sent from the intended Outlook account instead of the default one.

How to Change the Sender Account for a Word Mail Merge in Outlook
Product
Microsoft Word and Outlook
Device & OS
not provided
Scenario
A mail merge document is configured in Microsoft Word, but Outlook sends the merged messages from the wrong account because another Outlook account is set as the default.
Observed behavior
Merged email messages are sent from the wrong Outlook account; the sender address is controlled by the Outlook default account and sending settings.
Before you start

Confirm that you can access Outlook and know which email account should be the sender. Check the current Outlook default account because it controls the sender address for new messages and Word mail merge sends.

Solution 1Recommended

Set the desired Outlook account as default and enable Always use the default account for new messages

Use this when Word mail merge emails are sent from a different Outlook account; changing these settings makes Outlook use the intended sender for new messages and mail merge sends.

Outlook controls the sender address for Word mail merge messages through the default account setting and the Send Messages option. Updating these settings ensures new emails, including mail merge messages, use the correct account.

1
Open Outlook Account Settings

In Outlook, click File > Account Settings > Account Settings.

2
Set the desired account as default

Select the email account you want to use as the sender, then click Set as Default.

3
Enable the default account for new messages

Go to File > Options > Mail > Send Messages and check Always use the default account when composing new messages.

4
Rerun the mail merge

Return to Word and run the mail merge again; Outlook should now send from the account you set as default.

Set the desired Outlook account as default and enable Always use the default account for new messages
Default account applied: New Outlook messages and Word mail merge sends now use the account you marked as default.
Free Microsoft Office alternative

WPS Office Writer: A Free Alternative for Mail Merge Documents

The sender account issue is controlled by Microsoft Outlook and is not something WPS Office can change. If you want a free, lightweight Office alternative for creating and editing mail merge documents, WPS Office Writer offers familiar Word-compatible tools, opens .docx files, and helps you migrate without losing formatting.

  1. 1. Download WPS Office: Click Download WPS Office Free and install WPS Office on your Windows or Mac device.
  2. 2. Open your Word mail merge document: Launch WPS Office Writer and open the .docx file you used for mail merge.
  3. 3. Use Writer Mail Merge: Go to the Mailings tab and select Mail Merge to continue your merge workflow in WPS Writer.
Free to download and use for everyday office tasksOpens and saves Microsoft Word .docx files with strong format compatibilityFamiliar ribbon interface makes the switch from Microsoft Word easyWriter includes mail merge tools for letters, envelopes, and email merge workflowsLightweight and easy to use, with no need to change your Outlook default account for basic document work
microsoft office alternative - wps office

Frequently Asked Questions

Why does my Word mail merge send from the wrong Outlook account?

Word mail merge uses Outlook's default account and sending options. Open File > Account Settings > Account Settings, set the desired account as default, then enable Always use the default account when composing new messages under File > Options > Mail > Send Messages.

Can I choose a different Outlook account for a single mail merge without changing the default?

Standard Word mail merge does not include a per-send account picker. You can temporarily set the desired account as default, or use a third-party Outlook mail-merge add-in that lets you select the sending account for each merge.

Does WPS Office Writer support mail merge with Outlook?

WPS Office Writer supports mail merge workflows for documents. However, the Outlook sender account is controlled by Outlook settings, so make sure the correct default account and Send Messages option are configured in Outlook.

Will changing the default account affect all new Outlook messages?

Yes. If you enable Always use the default account when composing new messages, Outlook uses that default account for all new messages, including Word mail merge sends.