It's not actually support question, it's request to include Debian Wheezy to list of supported OSes.

I just set up iRedMail version 0.8.0, MySQL backend on Linux Wheezy (current testing).
Script itself will not install, complaining on unsupported OS release, so I dirty and brutally patched it (patch is here: http://pastebin.com/M8CyXKYi )

Some packages was not installed but required actually (dovecot-managesieve, dovecot-sieve, dovecot-mysql).

While running on clean system, there were errors caused by absent /etc/postfix/main.cf .

Cluebringer webui package was installed, but needs manual configuration.

Such commands may help, if you want to use iRedMail on Wheezy:
    apt-get update; apt-get install dovecot-managesieve dovecot-sieve dovecot-mysql postfix
    touch /etc/postfix/main.cf
    wget -O iRedMail-0.8.0.wheezy.patch http://pastebin.com/raw.php?i=M8CyXKYi
    dos2unix iRedMail-0.8.0.wheezy.patch
    wget https://bitbucket.org/zhb/iredmail/down … .0.tar.bz2
    tar -xjf iRedMail-0.8.0.tar.bz2
    patch -p0 < iRedMail-0.8.0.wheezy.patch
    cd iRedMail-0.8.0
    chmod +x iRedMail.sh
    ./iRedMail.sh

PS: there will be feature freeze for Wheezy in a month or so, so it is very close to stable. I run a couple of production servers on it -- no glitches.