I use Google Suite or whatever it is called these days (Google Enterprise or Google Workspace?) for my company's email. Although I would love to setup my own mail server but setting up an email server is a pain and too much hassle. May be in future.
Honestly I hardly send out mails but I guess there is no harm in at least having a newsletter. I will only send newsletter when I have something important to share or an update. People are busy and no one has time to read emails these days. If you really like my content then I guess you will remember my site and come back for more.