Ok first things first...
I have a Virtualbox machine running CentOS 6.2 64bit. I installed version 7.1.4 of the Zimbra opensource using the RHEL version 6 64bit.

I followed this tutorial:

Installing Zimbra Collaboration Suite 7 On CentOS 5.x (64Bit) | HowtoForge - Linux Howtos and Tutorials

figuring it to be pretty much identical to CentOS 6.2 but it is not.

I noticed a couple of things when I installed it.

1. To be able to get passed the creation of a self signed certificate you needed to open up sudoers file...
and place after...
Defaults requiretty
This extra bit...
Defaults:%zimbra !requiretty
Defaults:zimbra !requiretty
2. To make sure that zmconfigd can run successfully you also need to ensure that the package NC is installed. Which can be done by performing this...
yum install nc
So right now everything has installed nicely and the only thing that isn't running is MTA

I don't know why it doesn't want to start, if someone could be so kind as to point me in the right direction or maybe like point 2 I need to install something that wasn't installed when I did minimal install.