Auto Responder is a tool provided in cPanel through which you can send automatic replies when some one sends you a email. Suppose you are on a Holiday and will not be able to refer your emails for a week. In this case you can set a auto mail like “I am on holiday and will get back to you when I come back”. This email will be sent automatically when some email comes in your mail box, so that the sender comes to know that you are on a Holiday and will not be able to reply him for next couple of days.

An Autoresponder can be set using the below method.
1) Login into your cPanel and check the “Mails” section. You will get a option of “Autoresponders”.

2) When you double click on “Autoresponders”, you will get the below screen. Now you can click on “Add Auto Responder” to set a new Autoresponder.

3) When you click on “Add Auto Responder” you will get the below screen. Now you will have to fill all the fields present in it.

a) Character Set :- It can be left as default which is ansi_x3.110-1983.
b) Interval :- Its the email frequency or the gap in between sending 2 emails to a single email address. Suppose , if you set up an autoresponder with an interval of12, and you receive an email from [email protected] at 10 am, the autoresponder will respond to his message immediately. If, [email protected] sends another email after a few hours, the autoresponder will not send him another response for 12 hours after his initial email (which is 10 am). If he emails you again after the 12hours, he will receive an auto response.
c) Email :- You should enter your email address before @ in the 1st box and the remaining part i.e the domain name in 2nd box.
d) From :- You can enter your name or the name of the person under whose name those emails will be sent.
e) Subject :- You can enter the subject of the email in this section.
f) Body :- You can type the message in this section which will be sent as reply (auto response) to the email address from where you have received the email.

In this way you can set a Autoresponder in your cPanel