They are are distribution lists for electronic mail messages.
Lists tend to be organized for a specific purpose.
For example, the ky1n-list exists to distribute the KY1N Amateur examination list. It is considered bad etiquette to send mail to a list that does not relate to the purpose of the list. How to subscribe and unsubscribe Most lists are fully automated. You must follow the appropriate command syntax to subscribe and unsubscribe from the list. Requests are usually sent to the list server with the desired request in the body of the message.