What characteristic is associated with client-based email systems?

Client-based email systems are characterized by being installed locally on a computer. This means that the email application resides on the user's device, allowing them to manage their emails without needing to rely entirely on a web browser or an internet connection for every action. By having the software installed locally, users can access their emails, compose messages, and manage their inbox without being consistently connected to the internet, making it particularly advantageous for those who may work in environments with unreliable internet access or who prefer having a dedicated application for email management.

On the other hand, options focusing on accessibility from an internet browser relate more to web-based email systems. An internet connection for installation does not apply, as client-based systems are usually set up beforehand. Limited functionality is also not a defining characteristic of client-based systems, since many robust client email applications offer extensive features and capabilities that can surpass those in web-based alternatives.