The autoresponder (or confirmation message) is a message that is sent to form users when they hit Submit. The autoresponder content can be anything you wish: from a simple sentence confirming that the form submission has been received successfully to a more complex message containing follow-up information or details about special promotions.
To create an autoresponder, go to the Settings → Notifications section in your 123ContactForm account. Under Form User Options, tick the checkbox Send a confirmation message to the sender (autoresponder). Now you can click on Customize to edit existing autoresponders, delete them or to create new ones. Tick the option Attach a file to this autoresponder if you want to add an attachment to your autoresponder.