has anyone actually used these? I didn't know it existed
(Or actually to be fair Workmail is absolutely fine long-term and at scale if you only need the service and everyone will use whatever client. It's only really the web client that makes it look like a bit of a joke. But I'm not sure how many businesses that can really apply to, for one reason or another there's always going to be people that want/need a web client at least some of the time, or you need something else (like docs!) that anywhere you get is going to give you mail too anyway.)