How to enable auto-reply messages in Plesk
1. Firstly, login to Plesk.
2. Secondly, click the Mail tab.
3. Next, select the email address for which you want to setup an auto-reply.
4. Then, click the Auto-Reply tab.
5. Click to switch on auto-reply, then complete the form.
6. If you also want the original message forwarded to another email, enter it in the Forward to field.
7. Lastly, click OK.