Sender's name contains operator's "visible name" and "app name". "Visible name" is also added to email address.
"Visible name"= Myname
"App name"= www.mycompany.com
Sender name: Myname www.mycompany.com
Sender address: email@example.com (or your domain)
"Visible name" can be changed in Settings - Administrators:
Or you can also chanche personal data by clickin og operator's profile picture:
"App name" can be changed in Settings tab: