==== Required information ====
- iRedMail version (check /etc/iredmail-release):
- Linux/BSD distribution name and version:
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):
- Web server (Apache or Nginx):
- Manage mail accounts with iRedAdmin-Pro?
- Related log if you're reporting an issue:
======== Required information ====
- iRedMail version (check /etc/iredmail-release): 0.9.5-1
- Linux/BSD distribution name and version: CentOS6.8 64bit
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):  LDAP
- Web server (Apache or Nginx): Apache
- Manage mail accounts with iRedAdmin-Pro? Yes
- Related log if you're reporting an issue:
====

I've follow http://www.iredmail.org/docs/backup.restore.html

Error log
Dec 15 08:14:40 mx amavis[1592]: Found decoder for    .lha  at /usr/bin/7z
Dec 15 08:14:40 mx amavis[1592]: Found decoder for    .iso  at /usr/bin/7z
Dec 15 08:14:40 mx amavis[1592]: Found decoder for    .exe  at /usr/bin/unrar; /usr/bin/unarj
Dec 15 08:14:40 mx amavis[1592]: Using primary internal av scanner code for ClamAV-clamd
Dec 15 08:14:40 mx amavis[1592]: Found secondary av scanner ClamAV-clamscan at /usr/bin/clamscan
Dec 15 08:14:40 mx amavis[1592]: Deleting db files  in /var/spool/amavisd/db
Dec 15 08:14:41 mx amavis[1592]: Creating db in /var/spool/amavisd/db/; BerkeleyDB 0.43, libdb 4.7
Dec 15 08:14:44 mx postfix/postfix-script[1678]: starting the Postfix mail system
Dec 15 08:14:44 mx postfix/master[1679]: daemon started -- version 2.6.6, configuration /etc/postfix
Dec 15 08:45:39 mx roundcube: <4v0gi5pk> IMAP Error: Login failed for thaniyah@onecool.co.th from 110.170.184.50. LOGIN: Temporary authentication failure. [mx.onecool.co.th:2016-12-15 01:45:39] in /var/www/roundcubemail-1.2.0/program/lib/Roundcube/rcube_imap.php on line 193 (POST /mail/?_task=login&_action=login)
^C
[root@mx ldap]# nano /etc/init.d/slapd
[root@mx ldap]# cat /etc/iredmail-release
0.9.5-1     # Get professional upgrade support from iRedMail Team: http://www.iredmail.org/support.html
[root@mx ldap]# ^C
[root@mx ldap]# tail -f /var/log/maillog
Dec 15 08:14:40 mx amavis[1592]: Found decoder for    .iso  at /usr/bin/7z
Dec 15 08:14:40 mx amavis[1592]: Found decoder for    .exe  at /usr/bin/unrar; /usr/bin/unarj
Dec 15 08:14:40 mx amavis[1592]: Using primary internal av scanner code for ClamAV-clamd
Dec 15 08:14:40 mx amavis[1592]: Found secondary av scanner ClamAV-clamscan at /usr/bin/clamscan
Dec 15 08:14:40 mx amavis[1592]: Deleting db files  in /var/spool/amavisd/db
Dec 15 08:14:41 mx amavis[1592]: Creating db in /var/spool/amavisd/db/; BerkeleyDB 0.43, libdb 4.7
Dec 15 08:14:44 mx postfix/postfix-script[1678]: starting the Postfix mail system
Dec 15 08:14:44 mx postfix/master[1679]: daemon started -- version 2.6.6, configuration /etc/postfix
Dec 15 08:45:39 mx roundcube: <4v0gi5pk> IMAP Error: Login failed for thaniyah@onecool.co.th from 110.170.184.50. LOGIN: Temporary authentication failure. [mx.onecool.co.th:2016-12-15 01:45:39] in /var/www/roundcubemail-1.2.0/program/lib/Roundcube/rcube_imap.php on line 193 (POST /mail/?_task=login&_action=login)
Dec 15 09:01:56 mx roundcube: <4v0gi5pk> IMAP Error: Login failed for thaniyah@onecool.co.th from 110.170.184.50. LOGIN: Temporary authentication failure. [mx.onecool.co.th:2016-12-15 02:01:56] in /var/www/roundcubemail-1.2.0/program/lib/Roundcube/rcube_imap.php on line 193 (POST /mail/?_task=login&_action=login)