• i-MSCP versions >= 1.2.3
• mailgraph Debian package
• librrds-perl Debian package

• Login into the panel as admin and go to the plugin management interface
• Upload the Mailgraph plugin archive
• Activate the plugin

• Backup your current plugins/Mailgraph/config.php file
• Login into the panel as admin and go to the plugin management interface
• Upload the Mailgraph plugin archive
• Restore your plugins/Mailgraph/config.php file (check for any change)
• Update the plugin list through the plugin interface

Edit the plugins/Mailgraph/config.php:

• cronjob_enabled (TRUE / FALSE) ⇒ Enable or disable the cronjob to generate new graphs
• cronjob_config ⇒ Set the intervall for the cronjob. More infos: man CRONTAB(5) for allowed values