To set the email address to be used as the originating email address for all automated email notifications:
Navigate to Settings>Branding>Outgoing Emails.
Click Default Email Addresses and Names.
On the screen that appears, specify the following:
From email: the originating email that will appear in the outgoing message
From display: the name associated with the outgoing email address
Reply to email: the email address that should receive the message if the recipient replies
Reply to display: the name associated with the email address receiving the reply
Bcc to email: The email address(es) that should be copied on the outgoing email message, separated by a comma or semicolon if there is more than one
Click Save to commit your changes.