I am currently using Nylas N1 and I did see some alternatives last month. I decided to try them after I was done trying out N1. Well, now I cannot find the links and I think my browser messed with my bookmarks ;). So, kindly list the alternatives any of you are aware of. I did check all the links on http://alternativeto.net/software/n1/, but no good.
I tried polymail(no imap support for months), Airmail (no link tracking or read tracking,oddly slows my mac,lot of small bugs, UI felt sluggish), apple mail(haha - next one), outlook (too skeumorphic on mac + too heavy + no swipe gestures)<p>Went back to N1 now - so i guess i am not much help. Sorry mate.
I use Polymail and love it so far. It's fast, has a great UI and syncs very instantly. <a href="https://polymail.io/" rel="nofollow">https://polymail.io/</a>