Hello Charles,
Unfortunately there is no way within OnTime to re-open an item automatically when a new email has been added to the item. You can trigger Notifications when that occurs, but there's no way to automatically change the Status or the Workflow Step when that occurs. Here in Support we do it the way you described- we get an email notification and then we manually reopen the item- because when a new email arrives we usually end up having to edit other aspects of the item, and changing the status is just one more step we do when updating the other fields.
I've heard that some customers have developed their own applications to work with OnTime to perhaps emulate the scenario you describe, but we really can't suggest any particular method that we can support.
You can submit the idea to our development team by using our Customer Portal, and it's possible that feature will be included in future versions of OnTime.
Let me know if you have any further questions.
Thank you,
Tom Harder
Axosoft Support
support@axosoft.com1.800.653.0024 option 3--'Fear the Bug' Podcast--