An electronic mailing list is a collection of email addresses which get the very same message simultaneously. When you send an e-mail message to the mailing list address, your message will be forwarded to all the email addresses on that list automatically, but none of the receivers will see the other recipients. Generally, one has to subscribe to a mailing list, but sometimes mailboxes are included manually without their owners’ awareness. Depending on the specific list administration software, you may also be able to add new subscribers, so people will not be able to register for your mailing list unless you authorize their request. The mailing list functionality is exceptionally useful if you wish to send newsletters on a regular basis or some other kind of regular publications to customers, as you will need to send only one single email and all of the subscribers will get it instantly. As a consequence, you won’t need to enter numerous email addresses manually.