An auto-responder email is an e-mail that's sent back automatically to everyone who sends a message to an e-mail address with this feature activated. The senders will receive the automatic reply as soon as their emails are received and you will not have to a single thing manually. A couple of examples of making use of auto-responder e-mails are mailing an affirmation that a transaction has been received and also the order is being processed or that a person is on a break and will not be around for a particular period. In the first case the option will be enabled permanently, while in the second one it is temporary. Even though you work with an e-mail address limited to private correspondence, you can use an auto-responder to let the e-mail sender know that the e-mail has been received successfully.