I decided to start over. I had a new email server operational virtual Postfix Mysql + Dovecot + RoundCube.I transferred both databases successfully. I was able to creates a new account and modify an existing with Postfixtadmin. Also, I transferred the vmail folder to the new server but I am not able to display the emails. Roundcube shows the number of emails next to the INBOX but unable display it to the right side.
Any suggestion how can I transfer the information from one server to another?