[cobalt-users] Unable to send email to or from any address on the server :(

["First Hosting" <sales@xxxxxxxxxxxxxxxxxx>]

Hi,

All addresses on the server are being reported as non existent in email
clients.

Even if I try to send from pine, it still fails.

Tried re-booting the server.

All updates are installed - web sites are all up and running.

I did have a problem where the Active Monitor light was flashing,
showing a severe problem on disk usage, but the second screen shows two
green lights! 

Anyone have any idea as to where we can start to look for a solution.

The emails were fine this morning, and all of a sudden started to fail.

Regards,

Ian