An electronic mailing list is a list of email addresses that receive the exact same email message simultaneously. When you send a message to the mailing list address, your message will be forwarded to all the addresses on that list automatically, but none of the receivers will become aware of who the other recipients are. In the general case, people have to subscribe to a mailing list, but sometimes mailboxes are added manually without the approval of their owners. Based on the concrete mailing list management software, you may also be able to include new subscribers, so people cannot register for a mailing list unless you approve their request. The mailing list feature is exceptionally valuable if you would like to send newsletters on a regular basis or some other sort of regular announcements to customers, as you will need to send just a single e-mail and all of the mailing list subscribers will get it instantly. As a result, you won’t have to type in many email addresses manually.