I'd love a backup MX that acts clustered. Email is file/object based, I should be able to spin up 5 VPS and send/receive from any one of them without ending up

I'd love a backup MX that acts clustered. Email is file/object based, I should be able to spin up 5 VPS and send/receive from any one of them without ending up with an out of sync email. The closest I've found so far is aerogramme that stores in their own object store implementation but it's very much alpha https://github.com/deuxfleurs-org/aerogramme https://github.com/deuxfleurs-org/aerogramme