Polymail

Actually I'm not even try this app yet

I think it's probably the most professional personal email service provider. At least out of the free options on the market.

It is the best out there with all needed features, but they have been slowing down on their new feature roll out. There are some stability issues as well

Love where you are going with Polymail in general, but there's some stuff that pisses me out quite often. Like when you hit reply, but the text box doesn't activate automatically and you have to click on it to start typing. ARRRHGGGG. But otherwise lots of really useful features for sending out small email campaigns, sales, hiring etc.

After the super sad shutdown of Newton, I've switched to Polymail. It's not my perfect email app yet, but it's super close and well above anything else that's out there.

It's interesting to see Polymail moving into the collaboration space, as more and more companies understand how important is collaboration across multiple people and departments is. As that's exactly what we also focus on at Planable. TBH, not a fan of new version and new desktop app, as I significantly liked the previous one more, but wish good luck to the team ;)

I dont use windows, but my company just started using this a few days ago for work and I love it. The read receipts are the best ive seen, the team communication is excellent, and its got a boat load of great email features in general. LOVE!