If you want your own domain name (i.e. yourname@yourbusiness.com) you can buy it from namecheap or godaddy. Then you can set it up for free on Zohomail. Its what I did for my small business
I absolutely would recommend purelymail.com as well. I do self-host but this is quite a big undertaking, and even then you can occasionally get deliverability problems. For business use I would definitely use purelymail.
Privacy has become a very important issue in modern society, with companies and governments constantly abusing their power, more and more people are waking up to the importance of digital privacy.
In this community everyone is welcome to post links and discuss topics related to privacy.
much thanks to @gary_host_laptop for the logo design :)