==== Required information ====
- iRedMail version: 0.8.1
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):  mySQL
- Linux/BSD distribution name and version: Ubuntu 12.04
- Related log if you're reporting an issue:
====

The installation of iRedMail seems to be going just perfectly until this happens:
< INFO > Configure Postfix.
postconf: fatal: open /etc/postfix/main.cf for reading: No such file or directory
postconf: fatal: open /etc/postfix/main.cf for reading: No such file or directory
postconf: fatal: open /etc/postfix/main.cf for reading: No such file or directory
postconf: fatal: open /etc/postfix/main.cf for reading: No such file or directory
postconf: fatal: open /etc/postfix/main.cf for reading: No such file or directory
postconf: fatal: open /etc/postfix/main.cf for reading: No such file or directory
postconf: fatal: open /etc/postfix/main.cf for reading: No such file or directory
postconf: fatal: open /etc/postfix/main.cf for reading: No such file or directory

The error repeats several dozen times, and I wind up with a broken mail system.    What can I do to get it to correctly install?

Thanks!