E-mail autoresponders automatically reply to e-mail sent to a specific e-mail address on your account. You can use either plain text responses or you can use enhanced HTML responses. E-mail autoresponders come in handy to let people know that you did recieve their message or to inform people that you might not be checking your mail for a certain period of time. Or it could be used to send more information to persons that send e-mail to a specific address, such as info@yourdomain.com
Example: Your domain name is company.com. You setup the autoresponder info@company.com with any message you specify as the returned message. When any sends e-mail to info@company.com, they will automatically receive your pre-generated message.