Select the two basic types of e-mail systems.Multiple select question.HTML-basedclient-basedweb-based

To answer the question, we need to identify the two basic types of e-mail systems. The options provided are HTML-based, client-based, and web-based.

1. HTML-based: This type of e-mail system uses HTML (Hypertext Markup Language) to format and display e-mails. It allows for rich formatting options, such as adding images, links, and styling.

2. Client-based: This type of e-mail system requires the installation of a specific software or application on the user's device. Examples of client-based e-mail systems include Microsoft Outlook, Mozilla Thunderbird, and Apple Mail. These applications store and manage e-mails locally on the user's device.

3. Web-based: This type of e-mail system is accessed through a web browser and does not require any software installation. Users can access their e-mails from any device with an internet connection. Popular web-based e-mail systems include Gmail, Yahoo Mail, and Outlook.com.

Therefore, the two basic types of e-mail systems are HTML-based and web-based.