[grinich]

Michael from Inbox here. First of all, we love Fastmail and think they're great. :)

We're working hard to support any IMAP server, and it's our goal to support all providers. We just started with Gmail/Yahoo because they were the two largest services and made testing easier. IMAP is a tricky protocol to get right, with many various extensions that are not always supported or enabled.

We know we need to work to gain the trust of developers, and show that this is a product and company built by developers for developers. It's one of the reasons we decided to make the sync engine open source. Something that traditional "business school" folks would never do. We're going to keep making Inbox better and better, but the code will always be available for you to run yourself.

We're planning to release a hosted SaaS version of Inbox (think Heroku), so you don't need to host +terabytes of email data or manage sync infrastructure. We haven't announced details around that yet, but feel free to email me if you'd like access to the preview. [e-mail]