Send & Receive Issues

How to Send Word Mail Merge Email from a Shared Team Mailbox

Maira Mehtab Oct 9, 2026 869 views

Question details

Users need to send bulk emails via Word mail merge using a shared team mailbox rather than their personal default Outlook account.

How to Send Word Mail Merge Email from a Shared Team Mailbox

Product: Microsoft Word and Outlook
Device & OS: not provided
Scenario: Sending batch emails, newsletters, or team communications where the sender needs to appear as a shared team alias.
Observed behavior: By default, Word routes mail merge messages through the primary Outlook account and lacks a built-in option to select an alternative sender address.

Before you start

Ensure your Microsoft 365 administrator has granted you 'Send As' or 'Send on Behalf' permissions for the shared mailbox you intend to use.

Solution 1Recommended

Set the Shared Mailbox as the Default Account in Outlook

Since Word automatically uses your default Outlook account for mail merges, temporarily setting the shared mailbox as default allows messages to be sent from the team address.

For this method to work, the shared mailbox must be added as a distinct account in Outlook using its credentials (or your credentials if properly configured by your admin), rather than just appearing as an auto-mapped folder.

Open Account Settings

Launch Microsoft Outlook, click on 'File' in the top left corner, then select 'Account Settings' and click 'Account Settings' again from the dropdown.

Set Default Account

In the Email tab, select the shared team mailbox from the list of accounts and click the 'Set as Default' button. A checkmark will appear next to it.

Run the Mail Merge

Restart Outlook to ensure the change takes effect. Open Microsoft Word and complete your mail merge process as usual. The emails will now send from the shared mailbox.

Revert the Default Settings

Once the mail merge is completely finished, return to Outlook Account Settings and set your personal email back to the default account.

Set the Shared Mailbox as the Default Account in Outlook

Permissions Required: You must have the proper Send As permissions verified by your IT administrator to prevent the emails from failing or staying stuck in your Outbox.

Solution 2

Use 'Work Offline' to Manually Change the Sender

If you cannot set the shared mailbox as default and are sending a relatively small batch of emails, you can intercept them in the Outbox and change the sender manually.

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Frequently Asked Questions

Can I choose the sender email directly within the Word mail merge menu?

No, Microsoft Word does not provide a built-in dropdown or option to select the sender's email address during a mail merge. It automatically uses the default account configured in Outlook.

What happens if I do not have 'Send As' permissions?

If you try to send emails from a shared mailbox without 'Send As' or 'Send on Behalf' permissions, the emails will either fail to send, remain stuck in your Outbox, or generate an undeliverable bounce-back message from the server.

Are there automated alternatives to manual Outlook configuration?

Yes. Organizations frequently use Microsoft Power Automate, custom VBA scripts, or Microsoft Graph API solutions to automate sending bulk emails from shared mailboxes without relying on the traditional Word-to-Outlook mail merge.

Outlook & Email Problems