[otrs] Handling Out of office Notes

Any advice on how to handle "Out of Office Auto Reply"? customers open tickets and have these OOO things when we reply to them.. In an attempt to fix it, I set up a filter to move email that has "Out of Office Auto Reply" in the subject into another queue, but it moves the entire ticket, not just the auto-reply! anybody have similar issues or ways of dealing with this? thanks in advance, Andy