Give 777 or everyone permissions to the data folder and the folder inside
Go to the folder inc and edit config.php, change the marked options inside 
  

$smtp_server = "your_server_ip";      <-ip address of smtp server 



$mail_servers[] = Array(
"domain" 	=> "your_domain",         <- domain name
"server" 	=> "your_server",           <- server name or ip address this is on
"login_type" 	=> "%user%",                 <- this can be this or "%user%@%domain%", 
"protocol"	=> "pop3",
"port"		=> "110",
"folder_prefix"	=> ""
);

That's it nothing else to change, good luck
