[byoung2]

I have been looking for something like this for almost a decade and I even built a prototype and applied to YC with it in 2014. The problem is that in order to make email searchable, it has to be indexed by attribute and stored, most likely in the cloud so you can search on any device. That costs money, so any company will need to monetize it, either by selling your data or by charging you money. With so many free email providers out there, people are not willing to pay for enhanced email.