Osclass auto response plugin the best choice for your osclass site to give an automated response to emails.
This plugin sends an email to the user after the contact form is submitted, and in this email, the user is informed that will be contacted in the short time by the administrator of the site. When the contact form is submitted, Auto Response plugin send an automatic email to the email entered in the email field, as an automatic response to the question sent to admin, the user is informed to not replay on this message.