I have been using fastmail, my main email address is hi@<domain>, but I have set up a routing rule for *@<domain>, anything that is going to produce obvious spam, for example if I wanted to get a discount code through email, I would use spam@<domain> and have a rule set up for all of these emails to go to deleted, I can still check them for 10 days.

other things I have rules set up for too, to go to inboxes.

fastmail also lets you reply as the email that was sent to, so if someone emails me at test@<domain> they will get a response from test@<domain>