Step1: In the management area of the Plesk home screen, click Email Addresses to go to the Mail page.
Step2: On the Mail page, click the email address to be protected with spam filters.
Step3: Click the Auto-Reply tab.
Step4: Select the Switch on auto-reply check box.
Step5: Next to Message format, select the message format you want to use (plain-text or HTML).
Step6: In the Auto-reply message text text box, type the content of the message that you want to send.
Step7: In the Forward to text box, you can optionally specify an e-mail address that receives a copy of the original message.
Step8: Click on OK to finish the setup.