best way to run iRedMail on OMV

First of all thank you for a fantastic distro.

A little background:
I have had a Qnap Ts409p for many years. The Qnap was becomming to slow and I was running out of space on my shares. Beside the Qnap I had several servers running with saving data on the Qnap via NFS shares: Owncloud server, subsonic, Minecraft server, mailserver, Mythtv backend server and a RPi to monitor solarpower. All servers low power Fit-PC's er or similar.
My plan was to consolidate to save energi and at the same time get a faster NAS with more disks space. So the hunt started for a a motherboard with low TDP power prower enough to host all my server together with the new NAS.

I ended up with a NAS build out of a Asus E35M1-I motherboard with 8Gb (Gbit network and six sata III ports on board, a PCie card with two sata III and two USB 3 ports to host system disk). A Fractal Design Node 304 cabinet could host my existing six 1.5Tb Seagate ST315000341AS disks. All setup in a Raid6 configuration according to SerErris instructionshttp://forums.openmediavault.org/viewtopic.php?f=10&t=1333 with minor modification to raid6
I installed by installing Debian server with squeeze backports kernel and installing OMV afterwards.

Since i reused the old disks from the Qnap (plus two similar reserve disks) i had to build a Backup OMV-NAS from an old Via C7 mini pc with JBOD and rsync'ed everything over there to begin with. From the Backup NAS i rsync'ed everything to the new Production NAS. Migration wen't without problems and Production NAS is now running. I have moved Minecraft, Subsonic and my Solarpower monitor to the new NAS i have installed Owncloud (but have rights problems with the personal shares - more about that in another post)

My next task is to move the mailserver fra my present Ubuntu 12.04 server to Production NAS. Should I install iRedMail directly on Squeeze or should i enable KVM and run a Wheezy image with iRedMail i a virtual machine. All my mail is in vmail format on a share on Production NAS. The mailserver accesses the Vmailstore via NFS.

My cosiderations are:
- Can iRedMail coexist without problems with OMV on the same Squeeze OS? (iRedMail uses Roundcube webmail so I will have to move OMV to a Apache2 virtual host or to another port.)
- alternatively should i install iRedMail in a KVM-Qemu guest image with my OMV as a host. (I tried an experiment on Backup NAS but couldn't get DNS lookups to work for the OMV-host after setting up a bridged network for the guest - the guest had fine DNS lookups).
- What experiences are there with hosting a mailserver with webmail or KVm virtual guests on you OMV?

Ryancoon:
I have tried enabling KVM and could make e Wheeze guest. What stopped me from going further was tat my NAS screen turned to gibberish when I installed kvm and libvirt my OMV host. Besides that i couldn't lookup DNS on the OMV host after enabling the br0.
The screen part wasn't a great problem sine i run my OMV headless but i was a bit concerned about the stability because something obviously was not ok.
The guest system worked fine with DNS lookups but i couldn't get the host to do lookups Tried both edit /etc/resolv.conf and entering a dns-nameservers ind /etc/network/interfaces. Nothing helped.

My test /etc/network/interfaces was like this:

......
auto eth0
iface eth0 inet manual


auto br0
iface br0 inet static
        address 192.168.0.100
        network 192.168.0.0
        netmask 255.255.255.0
        broadcast 192.168.0.255
        gateway 192.168.0.1
        bridge_ports eth0
        bridge_fd 9
        bridge_hello 2
        bridge_maxage 12
        bridge_stp off

ryecoaaron: could you post your /etc/network/interfaces of your KVM host
I run my squeeze with backport kernel