Electronic mailing list members are users that get mass emails, such as weekly or monthly newsletters. Depending on the mailing list management software that’s used to manage a particular list, they may have signed up personally, expressing their explicit approval to be part of the mailing list, or they may have been added manually. The latter suggests that they will de facto receive unsolicited email messages. Ordinarily, members can be managed by the mailing list owner who can authorize or delete them, or they can manually unsubscribe in case they do not wish to get emails from now on. All mailing list members will invariably receive the very same message as long as they belong to the same mailing list, but a single subscriber will never be able to view the rest of the mailing list members in the "To" field of the message.