All the bills receipts are sent from receipts@oxebox.com email address, we however use your company name set as part of JSON request in "From Name" and use your "Reply To" E-mail as the reply-to address if any of your customers were to respond to a email. If you require bills to be sent from your own email address and domain, it requires additional cost, access to your domain records and adding SPF and DKIM records with your hosting provider.