Creating an Out of Office reply for Horde
This article explains how to add an Out of Office or Vacation reply in the webmail interface of a Horde webmail client on the Plesk Hosting service.
If you are unsure how to access webmail, please consult How to Access Plesk WebMail.
Steps
While logged into the webmail interface, click on Mail in the top left
Click Filters
Click on the Vacation filter
Select the Start of vacation, the End of vacation, type a Subject for the vacation message, type a Reason, and then click the Save and Enable button
Verify in the bottom right that you see that the Changes saved and Rule Enabled