An electronic mailing list is a list of email addresses which get one and the same email message simultaneously. When you send a message to the mailing list address, your message will be redirected to all the addresses on that list automatically, but none of the receivers will become aware of who the other recipients are. Generally, users have to subscribe to a list, but sometimes email addresses are included manually without their owners’ awareness. Based on the specific list administration software, you may also be able to include new mailing list subscribers, so people cannot join a mailing list unless you authorize their signup request. The mailing list option is rather valuable in case you want to send newsletters on a regular basis or some other type of regular notifications to clients, considering that you will need to send out one single e-mail and all of the subscribers will get it instantly. As a result, you will not need to fill in a lot of email addresses manually.