After a successfully implementation of OpenARC on a Linux enviroment I have now started to look at the possibility to implement it on a Exchange environment.
I am fully aware that the draft is subject to change, but providers like Google has already implemented it. Therefore, I would like to deploy it on a Exchange 2013 server.
So my question is, what is the best approach to deploy ARC (Authenticated Received Chain) on a Exchange 2013 environment? Is it even possible yet? Or should I relay the mails throu another server which signs the messages with the ARC header and DKIM?