An electronic mailing list is a list of email addresses which get the same message simultaneously. When you send an email to the mailing list address, your message will be re-sent to all the addresses on that mailing list automatically, but none of the receivers will see the other recipients. Generally, users have to sign up for a mailing list, but sometimes email addresses are added manually without the consent of their owners. Based on the particular mailing list management software, you may also be able to greenlight new subscribers, so people cannot join a mailing list unless you authorize their signup request. The mailing list option is quite valuable in case you wish to send regular newsletters or some other type of regular notifications to customers, considering that you’ll have to send only one email and all of the mailing list subscribers will get it instantly. As a result, you won’t have to type in multiple email addresses manually.