I tried to install IRedMail on ubuntu 10.04 (server edition x64) following the how to which titile in the thread title.
It stopped before end of configuration with a (google well known) problem of postfix-policyd. My terminal output is:
Errors were encountered while processing:
E: Sub-process /usr/bin/dpkg returned an error code (1)
< ERROR > Installation failed, please check the terminal output.
As this how to is dedicated to ubuntu 10.04 and last revision of IRedMail, I wonder if something could have been forgot in the how to or there is still persistent problem between postfix-policyd and ubuntu 10.04 ?