Hey,
as you’ve seen seen the rather big discussion, most of the answers to your questions below might not be what you want to hear.
technically yes, if you are able to develop a Zammad addon.
(This requires programmer skills on ruby base)
See: Examples of zpm files? - #3 by thorsteneckel
negative
You use use the Zammad-API for this, but this might be rather trouble some, as Zammad does not have webhooks at this moment. Technically creation of new messages within Zammad are not the issue here, rather getting answers by your agent will be. Quite complex toopic.
Please don’t expectg a walkthrough 
Nobody I know of has this up and running with Zammad at the moment.
Another approach would be -at this moment- custom development.
However, this costs money and might not be what you’re aiming for.
Best regards