My server crashed.
My server never crashes.
I installed an email client called mutt on my server. Mutt sends me copies of all of my server databases every single night so that I won’t ever lose my stuff. Mutt also has a feature that I was unaware of that automatically saves every single email ever sent.
It was 16.5 gigs. It maxed out my server storage.
I deleted it and turned that super helpful function off. All good!