Inbound Action - How to create record for email replies, when matched record is not in the Inbound Email Action's table

1. User receives an email from an IT Incident (servicedesk@email.com)
2. User REPLIES to the email, but intentionally changes the To: line to (secretaryteam@email.com), another SN ServiceNow inbound mailbox
3. The email updates the original Incident from Step #1 - Likely due to the Ref:Msg block. So it Ignores the Inbound Actions associated with secretaryteam@email.com
- The Inbound action log gives this info message: Skipping script '*subject*', email is a reply, and the record it matches is not in the Inbound Email Action's table

Is it possible to safeguard against users who email prevent against users who reply to messages AND changes the email address?
Or is this a training issue, and users should be instructed to "Forward" the messages?