Thank you for the elaborate explanation. This is roughly how I'd imagine it. It's unfortunate that we rely on opaque proprietary systems and informal deals bet

Thank you for the elaborate explanation. This is roughly how I'd imagine it. It's unfortunate that we rely on opaque proprietary systems and informal deals between providers for what is arguably fundamental infrastructure. It feels awfully hard to fix this within email without breaking the end user experience. Do you have any thoughts on how to improve it?