By default, email notifications are sent from the user who set up the email notification feature. However, it is often preferred to have the email sent from a generic shared inbox, such as contact@companyname.com. To set this up, follow these steps:
Click the button displaying the email address of the sender (usually located at the top and highlighted in green).
A menu will appear. Choose 'Send as'.
Enter the email address you want the email notifications to come from (e.g., contact@companyname.com).
Note that the user authenticating the email notification feature will need ‘send as’ permission on the shared inbox in Microsoft 365; otherwise, the email notifications will fail to send.