Mailing list members are users that have joined a specific list to receive periodic emails, including weekly newsletters. In case the mailing list client software that is used to manage the list allows it, you can also approve mailing list members manually, but in this case such emails may be recognized as being unsolicited and reported as spam by the users. Basically, these mailing list members can unsubscribe from a mailing list by clicking a hyperlink in the emails they receive, or you, being the mailing list admin, can manually delete them in case they request this or if you decide that some of the mailing list members should not belong to the mailing list any longer. Each member will be able to see only their own address in the "To" section of the emails they get, but not the email addresses of the remaining members of the mailing list.
