What's the fanciest email client?

Question

Ideally, an email client that works within the browser, or at least downloadable in both Windows and Mac.

Henry Benn · Accepted Answer

I find you can't go wrong with Inbox. Looks good and easy to use, and while it may be feature light, what it does have works well.

Tejas Kinger · Answer

If you're looking for a beautiful, downloadable email client for mac, you can't go wrong with polymail.

Answer

I would say the same as @tejaskinger. Polymail for Mac is easily the best yet.

Allan Caeg · Answer

This makes your browser-based Gmail fancy. Adds email tracking, mail merge, email scheduling, templates, etc... right within the Gmail webapp

Answer

Inbox by Gmail is pretty good too. But, I never caught on with it. You can give it a go if you are a Google fanboy.