Smart monitoring of harddiscs

Now we have exim4 email setup on our server, it would be nice to get alerts of impending doom for our harddiscs. So let's setup smart monitoring with smartmontools.

Exim4 to Gmail with ubuntu

It's handy if your server can mail you alerts (think smartmon and the likes), and as gmail completely allows this and most people have a gmail account anyway, let's do a quick setup of the exim4 email server.

Just create a new email address at gmail, so we dont run into trouble with exim4 accidently sending so much messages your gmail account becomes blocked for suspected spamming and such.

Getting statistical values from Exim4 in Zabbix

I made a quick few modifications to our Zabbix installation to monitor mail coming in and spam counts/day and such...
This could still use a lot of improvements, but for now at least I am happy :)