"Messaging System" gives you the ability to communicate with sellers directly from this site without having to open up your email client. If the seller replies to your message through the Message system, that message will be stored on this site for you to retrieve later.
This site has 2 different levels of communication privacy.
PRIVATE - This keeps your email address invisible to other users on the site. All communications sent to you are kept in the list below with this setting. By answering communications privately through this site you keep your email address private.
PUBLIC - This setting makes your email address public. All communications are sent to your email address.