I attended one of DNSME's webinars, and they went over DNS failover. Most of it went over my head so fast I ended up with a buzzcut, but one thing was clear, DNSME is no ordinary DNS provider. They offer some really advanced features like failover, load balancing, traffic redirection, etc. and I really wish that's something I could make use of on Cloudron. It's definitely an overkill, but it's a move in the right direction.