An electronic mailing list is a collection of email addresses which get the exact same message simultaneously. When you send an email message to the mailing list address, it will be redirected to all the email addresses on that list automatically, but none of the receivers will know who the rest of the recipients are. In the general case, one has to register for a mailing list, but sometimes mailboxes are added manually without their owners’ permission. Based on the specific mailing list management software, you may also be able to add new subscribers, so users cannot subscribe to a mailing list unless you okay their request. The mailing list option is quite useful if you want to send regular newsletters or some other type of periodic announcements to customers, considering that you will need to send a single email and all the mailing list subscribers will receive it instantly. As a result, you won’t have to enter numerous email addresses manually.