This section of your admin console allows you to change the main settings of the list you are in.
It's divided into four areas:
Properties
Here you can modify the categorization of your messages, sender parameters such as email address, or email and sms sender name, enable subscription confirmation messages, modify unsubscription settings, set advanced options both for email and text messages.
Header
Allows you to customize the header of your email messages.
Footer
Allows you to customize the footer of your email messages and remove the MailUp logo (with the No Logo option.)
RSS
Allows to create and edit the external contents in RSS/Atom format that you add to your email messages.