Hi Natasha,
To change the sender's email address in mail merge with word, we need to add the email account to our desktop Outlook application. After that, it’s possible to send e-mails to a large group of people through mail merge from another account.
To achieve the feature, we need to make some changes in our corresponding Outlook application account first.
- Add the email account you wish to send From to your Outlook account.
- Set it as the default email by going to File/Account Settings/Account Settings and clicking on the email you want.
- Click on Set as default - a check mark will appear next to the account.
- Then go to File/Options and under the Mail Category/Send Options make sure that the "Always Use the Default Email to Send Messages" is checked off.
- Save and Exit.
For your reference:
Or you can achieve it via another method below.
- Go to the Outlook application, click FILE > Account Settings > Email and set the account which you want as default.
- Go to FILE > Account Settings > Data Files and change the default data file associated with the email account you want to use it.
For your reference:
Regards,
Allan