Supports IMAP and POP. Mail providers like gmail, yahoo and hotmail should work pretty well. Doesn't do calendaring. Runs on WinXP. Don't know about that old OS X version, but I think it probably does. Runs on old Linux (when we release the Linux version that is). You don't even need gtk or qt, though it'll use them if it can find them.

Is there an ETA for the linux version ? Or a beta ?

edit: ah I see https://news.ycombinator.com/item?id=5860776 , around a month then.

Excellent! Now put that information on the web page somewhere so that others don't have to wonder. It doesn't even have to be on the home page, just somewhere. :)

As a downside, I see that it doesn't support Exchange and that pretty much dooms it for me, at least on OS X. I hate Exchange, but I have to deal with it. Luckily, Apple's Mail.app seems to work fairly well with Exchange so at least I'm not forced to use Outlook.

What do you mean by "what mail providers they support"? Opera supports POP and IMAP. That basically means any email provider out there.

They definitely need a better landing page to really 'sell' this thing. Should do a contest of one for them.