Mailing list subscribers are users that get bulk emails, such as weekly and/or monthly newsletters. Based on the mailing list client app that’s used to manage a particular mailing list, they may have joined personally, expressing their explicit approval to be included in the mailing list, or they may have been included manually. The latter means that they will technically get unsolicited email messages. Usually, members can be managed by the mailing list owner who can add or delete them, or they can unsubscribe manually in case they do not want to receive emails from now on. All members will invariably get the same message on the condition that they belong to one and the same mailing list, but a single subscriber will never be able to see the other mailing list subscribers in the "To" field of the message.