I was writing PHP code to send users of my site an automated email for account creation/verification... However, when I tested the code everything worked just fine, except the sender is myusername@myusername.heliohost.org. How can I change this address so that users see that the email is sent by myusername@mydomain.com instead? I know it has something to do with changing Service Configuration/PHP Configuration but I can't even find that in my cPanel... Please advise on what to do next. Thanks in advance!