So after a day or two I will see in the System Check that Spam Assassin is not running.
After a reboot it is fine but while Spam Assassin is not running, no email is processed which poses a problem.
I am running Ubuntu 14.04.3 LTS with 1GB of memory on a Digital Ocean droplet.
What would you recommend I look at in order to determine why it is failing?
One additional note - I tried to do an upgrade just in case there was a later release available but it seems my box ran out of memory. Is there any ways to shutdown MailInABox before attempting an upgrade to free up resources?