Yeah, after Sparrow was killed off I switched to Airmail for OS X (currently using Airmail 2). It's not without flaws and I'm always keeping an eye on the options.
On iOS I'm pretty happy with Microsoft Outlook (can't believe I just said that), I haven't found anything better yet.
I do use multiple accounts extensively so that limits my choices to just those clients that support multiple accounts well (unified inbox, etc).
If you're a desktop email aficionado, I'd love to hear your feedback on N1. It's kind of similar to Mailbox desktop, but works cross-platform and is open source. https://nylas.com/n1
I tried it with a single account, the UI is nice but I kind of prefer a more dense UI for email. I'm probably just really used to Airmail's UI, it's similar to what Sparrow used to be and I felt that was approaching perfection at the time.
Also the memory footprint was a little large but that's understandable since it's built on Chrome/Node. Web browsers and development related processes (mostly Ruby) are my top memory consumers right now, I'd rather not have my email client join their ranks.
Does it have a "snooze email" feature, though? The page suggests it doesn't, and that's (IMO) the important part of Mailbox, not just the general interface of it.
Is the email stored on your servers ? Do we get contacts and calendars inside the app as well ? If yes, on which email providers/account types ? Why isn't this info on the website ? Thanks.
On iOS I'm pretty happy with Microsoft Outlook (can't believe I just said that), I haven't found anything better yet.
I do use multiple accounts extensively so that limits my choices to just those clients that support multiple accounts well (unified inbox, etc).