I just finished to read a copy of “CentOS System Administration Essentials”, written by Andrew Mallett, which I got from the editor for review. Here is what I found. CentOS System Administration Essentials Virdict: a good book, except a couple of (small) points I have enjoyed reading this book, which I am going to call CSEA from now on for brevity. I think it is, indeed, a useful, synthetic tool for beginner system administrators.
Taking full control of your own email, that is running your own email server, is a must if you really care about privacy, security or maximum customization.