I understand folks who feel hesitations regarding Gmail. I do. But Google offers an insane amount of storage, the search is incredibly fast, and I’m a Gmail dude. I accept this about myself.
I can’t pinpoint exactly when I began hating Apple’s default Mail.app on macOS. But I can’t stand it. Search is slow, and the interface just doesn’t work the way that I want it to. I even spent a couple years using Gmail on the web, which — I mean, intellectually, is gross. But I did it.

But boy howdy, do I love Mimestream.
Some folks object to apps that are Gmail-only, which I get. But I’m also essentially Gmail only, so it works for me. It takes everything that Gmail does right, and puts it in a Mac-assed Mac app. Fantastic.
After years of working in Gmail, and falling in love with its keyboard shortcuts, it thrills me that Mimestream lets me use Gmail’s web-style keyboard shortcuts in a Mac app. “E to archive” is pretty sweet for my use case with all the muscle memory I’ve built up over time.
Mimestream handles multiple Gmail accounts cleanly, so you can separate work and home without difficulty. And it integrates cleanly with Google Calendar — which I also rely upon! — so you can accept meetings and even spot conflicts without leaving your inbox.
Paying Mimestream users can also opt-in to the iOS beta. It’s become my default iOS email client. My distaste for Mail on iOS wasn’t as high as my distaste for the Mac version, but I love that now I can use Mimestream anywhere.
Even better, Mimestream — unlike Mail on either platform — can give you instant push notifications for new messages, so if you’re someone who wants to know the second some store you once shopped at years ago is having a sale, you can get that feature, too.