At the top menu bar, click on Settings.

 

 

 

You will see the following screen as shown above. Click Auto Responder on the left panel.

 

 

 

Enter a message that you want your receiver(s) to see. Remember to change the Status option.

If you choose "Respond after a period", you are to enter the number of days a responder should be inactive. When the number of days the last response exceeds the limit a new responder will be automatically sent.

For example, typically you would use a low number such as 7. In such case the sender no matter how many messages he sent during 2 weeks will receive 2 responder messages. The second one will be sent after a week from the first one sent.

Lastly, click on Save Changes.