I have been using fastmail, my main email address is hi@, but I have set up a routing rule for *, anything that is going to produce obvious spam, for example if

I have been using fastmail, my main email address is hi@, but I have set up a routing rule for *, anything that is going to produce obvious spam, for example if I wanted to get a discount code through email, I would use spam@ 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@ they will get a response from test@