How to move mail hosting with ISPConfig3 (dovecot, postfix, apache2, …) from CentOS 5 to CentOS 6
 28-11-2012   (Here, CentOS 5.8 with ip 10.100.1.2 and CentOS 6.3 with 10.100.1.3)   CentOS-5.8 is installing ISPConfig-3.0.3.3 and we will update to ISPConfig-3.0.4.6 on CentOS-6.3   Step1: Backup mailbox and dbispconfig database on CentOS 5.8    Backup all mailbox of users, mail domain     #tar czvf /backup/mailbox.tar.gz /var/mail    Backup dbispconfig database     #mysqldump -u root -p dbispconfig >/backup/dbispconfig.sql   #Enter password: …. (password of root user)   Step 2: Installing new CentOS 6.3 and configuring services    Installing CentOS-6.3    Copy mailbox.tar.gz and dbispconfig.sql from 10.100.1.2 to 10.100.1.3   #scp /backup/mailbox.tar.gz  root@10.100.1.3 :/var/download   #scp /backup/dbispconfig.sql  root@10.100.1.3 :/var/download    Installing services(Apache2, dovecot, ..) the following http://www.howtoforge.com/perfect-server-centos-6.3-x86_64-apache2-dovecot-ispconfig-3-p6  and finish at step 23 (Install Squirrelmail), have not install step 24 (I...