It really is crazy fast. I get notifications from my browser and phone about new emails almost simultaneously. And if I read the notification on my browser, it

It really is crazy fast. I get notifications from my browser and phone about new emails almost simultaneously. And if I read the notification on my browser, it instantly disappears from my phone, and vice versa. Honestly, it works how it just ought to. Can't give higher praise than that. I've been super happy with Fastmail. Can't recommend it enough. The stuff they're doing with JMAP is really nice too -- should give it a read if you haven't seen it before.