An email client is a software application that allows users to send, receive, and manage their email. It can be installed on a computer or mobile device, or accessed through a web browser. Popular examples of email clients include Microsoft Outlook, Mozilla Thunderbird, and Apple Mail. These applications help organize emails into folders, filter spam, and provide tools for composing messages. Email clients connect to email servers using protocols like IMAP or POP3 to retrieve messages. They often include features such as calendars, contact management, and task lists, enhancing productivity for both personal and professional use.