Configure Email Authentication for Microsoft Exchange

Need to establish a process for setting up DKIM, Domain Keys, SPF, and Sender ID email authentication for email sent from one domain on behalf of another domain (example, say you have an Exchange Server on IP 1 2 3 . 2 . 2 . 2 resulting to A B C . C O M and it's sending email for a user who's email address is , in that case X Y Z . c o m needs to be authenticated somewhere so that when the email is received by the client and it looks up authenticated domains allowed to send on its behalf, it should find A B C . c o m This of course maximizes email deliverability which is the goal of this project.