Email response updates ticket

[jm1280]

I have looked around and not seen anything in regards to my question so I thought I would post. If I missed a thread I apologize. When a ticket is created and the agent responds to the end user, they get an email. Is there a way the end user can just respond to the email to update the ticket without having to follow the link to the site to respond? I have configured email fetching but I am not sure this is the same thing. Any help would be appreciated.