Privacy-minded business owners, what is your email service?

I have been battling for the past few weeks to find an e-mail service that fulfills all my needs. I am in the process of starting my freelancing career and I need an email provider that's gonna be for the day to day activities one has while running a business.

More specifically, I am looking for:

- An email with a calendar, that I can sync seamlessly between my android phone and my laptop.

- has aliases

- can use …

business career e-mail email find freelancing mail privacy process running service what is