Hi,
I am evaluating mail server solutions for a small business. The trouble is, I am only a part-time admin and a newbie to mail servers.
I too would strongly advise you to use Google Workspace (the recent new name for G Suite, previously known as Google Apps). It's cheap, very reliable, and has all features you can dream of, including an autoresponder. It's unrealistic to think that it's possible to beat a service that costs a mere USD 6 / user / month (and is free for nonprofits!).
Gregory
