What is the Linux Shell Script Mailx about?

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Linux Shell Script Mailx is a command-line utility that is used to send and receive emails from the Linux command line. It is used to automate email sending from within shell scripts and other automated processes in Linux. With Mailx, one can send emails from the command line, send emails with attachments, set email priority, and control the format and headers of the email. Mailx can also be used to read and manage email messages from the Linux command line, which makes it a powerful email client for Linux users who prefer to work with the command line.