Mail-delivery packages send the received mail to the proper user. One of the most widely used is called deliver. In most cases, you don't have to do anything to install and configure deliver. When you installed the mail software using the Linux installation routine, the necessary software was installed and configured properly. Mail User Agents Mail user agents are the mailreaders you use to see your e-mail.
Many newsreaders are available.
Your choice of mailreaders is more a personal preference than a feature-based decision. You should edit the elm.rc file to replace the names with proper values. Another popular mailreader is mailx, which has been available for UNIX systems for many years. Versions of mailx are available for Linux on many archive sites. Make sure you get version 5.3b or higher because there are security problems in version 5.3a.