i have some questions
 

1- how to get a full report of outgoing mails from our server

2- my old shared server was in reseller package CPanel , is there any way to move files , mails , everything from Cpanel to ISPConfig without losing information of mails (inbox , outbox ... ) using backup

3- how to adjust concurrent connection per domain to 5 and concurrent connection per server to 50 in the mailserver ( dovecat - postfix )

4- how to modify in ISPCongig index.php page , like removing the news pane , adding our company adress ......

please reply me in step by step answer