1. apt-get install mailgraph rrdtool
2. Edit /etc/default/mailgraph and change MAIL_LOG to be MAIL_LOG=/var/log/mail.log
3. Copy mailgraph.cgi to /usr/lib/cgi-bin/mailgraph.cgi
4.change /var/lib/mailgraph/ owen apache run user
chown www-data:www-data *
5. /etc/init.d/mailgraph restart
6. http://serverip/cgi-bin/mailgraph.cgi
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TAG: postfix mailgraph ubuntu