Changes

Last week, we configured and ran the '''Postfix''' application for our MTA (MTA a.k.a. SMTP server) on our '''vm2''' and '''vm3''' machines. This  That setup had a drawback, in that it ::* It required an SMTP server to be configured on each machine. :* The Message Store ('''MS''') would also be unique to each machine: - what a user received on one server would not exist on any other.  In this lab we will centralize some of this information, so that a user can send email from any machine in the network, and have incoming mail sent to a centralized messages store.