An auto-responder email is a an email that is sent from your mailbox as the reply to each email that you get. The content is predetermined and it is sent automatically, so every person that contacts you via electronic mail will get it once their message is received on the system that handles your emails. This feature is used if you have to notify individuals about different things, including being out of the office for a given time period or that the purchase is received and is being processed. The auto-responder email in addition serves as a verification for those who make contact with you their e-mail is received, even if you are not able to read it and make contact with them at once. It could include any text that you choose and also it can be edited based on the particular occasion.