Every campaign and flow email is sent from the email address you entered in onboarding step 1 (the sending-account email on your domain) with your business name (the Client Name from your settings) as the display name. You can see the address in the campaign wizard under Review and Confirm > Sender and on the campaign page as Sender email. In the current version there is no per-campaign "from" selector; to change the sender address you would need to redo the sending-account setup with Sprwt support.