Thanx for the update, I tweeted them repeatedly, never getting any reply. It looks pretty bad that the last tweet is so old. In the meantime, I've been using Nylas N1 (local mail client) and ownCloud mail (webmail), both have become pretty good!
Oh, thanx for the product! One question, I just read here on HN that Nylas stores certain data on Nylas servers. I actually thought it was just a local mail client like Thunderbird (only better looking and more modern). It's not very clear from the website what exactly happens to my mail and login credentials, do you have some pointers?