[tomsem]

FWIW, I AirDropped an AZW3 file to my phone, the PocketBook app alone offered to receive it, but many minutes later, it is still showed a PocketBook logo animation. I finally force-closed it. I sent ePub and it loaded right up. So evidently the app needs an update to support AZW3.

I also sent it to my Send-to-PocketBook address. It did not give me an error email, but it hasn't shown up on my PocketBook Era (which evidently needs an update to support it) or in the iOS App (does this work with the apps or only if you have a PocketBook device?).

Update: the SendToPB AZW3 attachment showed up on my Era, however it gives the same error as if I had side-loaded it when I try to open it ("Unable to open book...."). And it looks like it simultaneously showed up in the iPhone app (as MOBI) and just as when I tried AirDrop to transfer AZW3, it hangs the app.

So I hope they roll out this support sooner rather than later.