I have a DigitalOcean droplet running Postfix, which provides edge security and a private IP, but no storage. All my mail is routed through this droplet across

I have a DigitalOcean droplet running Postfix, which provides edge security and a private IP, but no storage. All my mail is routed through this droplet across a VPN to my home Exchange server. Exchange backups are encrypted and stored on Amazon Cloud Drive. Yes, there's a reliance on cloud services for backup storage, but the only time I'd need the offsite backup is if my home servers both became unavailable for some reason. I'm happy with taking the chance that, if that happens, it won't happen at the same time as Amazon closing my Cloud Drive account. I admit though, this is probably over the top for most people. I do it because email is my job, so it's useful to have my own servers for testing stuff.