New server
- centos 5.8
- iredmail 0.8.3
export and import mysql,policyed, amavisd,roundcube,vmail and copy user mail folder to new server and change permission 0700
chown vmail:vmail, login no problem but can not send mail server said: connect to imap server faild

This is maillog
Feb  5 08:56:26 www postfix/qmgr[5419]: 592F638903BA: from=<souvanny@mpt.gov.la>, size=1000, nrcpt=1 (queue active)
Feb  5 08:56:26 www postfix/pipe[10918]: 592F638903BA: to=<sou@test.com.la>, relay=dovecot, delay=76007, delays=76007/0.02/0/0.02, dsn=4.3.0, status=deferred (temporary failure)
Feb  5 09:16:26 www postfix/qmgr[5419]: 71E5238903BE: from=<tao@test.com.la>, size=1464, nrcpt=1 (queue active)
Feb  5 09:16:26 www postfix/pipe[11025]: 71E5238903BE: to=<sou@test.com.la>, relay=dovecot, delay=84100, delays=84100/0.02/0/0.02, dsn=4.3.0, status=deferred (temporary failure)
Feb  5 09:21:26 www postfix/qmgr[5419]: 47AA838903BD: from=<tao@test.com.la>, size=1455, nrcpt=1 (queue active)
Feb  5 09:21:26 www postfix/qmgr[5419]: 5FE2C38903BB: from=<tao@mpt.gov.la>, size=978, nrcpt=1 (queue active)
Feb  5 09:21:26 www postfix/qmgr[5419]: 0057D38903B9: from=<souvanny@mpt.gov.la>, size=988, nrcpt=1 (queue active)
Feb  5 09:21:26 www postfix/pipe[11043]: 47AA838903BD: to=<tao@mpt.gov.la>, relay=dovecot, delay=84453, delays=84453/0.02/0/0.02, dsn=4.3.0, status=deferred (temporary failure)
Feb  5 09:21:26 www postfix/pipe[11044]: 5FE2C38903BB: to=<tao@test.com.la>, relay=dovecot, delay=84488, delays=84488/0.01/0/0.01, dsn=4.3.0, status=deferred (temporary failure)
Feb  5 09:21:26 www postfix/pipe[11046]: 0057D38903B9: to=<tao@mpt.gov.la>, relay=dovecot, delay=84596, delays=84596/0.01/0/0.01, dsn=4.3.0, status=deferred (temporary failure)

How do i do ?
I do follow this Link but can not use
http://www.iredmail.org/wiki/index.php? … ail.Server
Thank you for help me