G-Suite - Google's suite of Mail, Docs, Calendar and more...

https://gsuite.google.com/

I have been running Art House on G-Suite (and it’s pre-decessors) for at least 6 years. It allows me to have up to 5 email accounts, from our own domains, all flowing through the one mailbox and seamlessly takes care of 99.9% of spam for me.

I use Google Calendar, Google Docs, Google Sheets and Google Drive. All of these are mirrored on all of my computers both at work and at home so no matter where I am, I have access to everything. I pay around $10 a month and have UNLIMITED storage on Google Drive, it’s awesome!