an email utility that automatically sends a standard reply message to incoming email messages
a pre-written email reply
a pre-written reply that is sent automatically to anyone who emails you
a response that is automatically sent to anyone who sends an e-mail to a particular address
This is when you are going away and you want an automatic reply when someone emails your JCU A/C to say you will be away from a designated time.
A message automatically sent as a reply to any message received in a specified mailbox, in this case to inform the original sender that the recipient is away and will not be able to respond. Also known as an autoresponder.