I've got an existing site which I've taken the maintenance on for a client.  It's running 6.2.2, and I've changed the email address (from) in the mail settings (I'm using PHP mail, which has worked fine in the past).  However, when I click 'test', I get the following:   I can't see where to set a 'to' address - there's no option on the page I'm on - I've attached a screenshot. Any pointers in the right direction will be appreciated.