Here’s a good guide on how to go about this :) https://btmiller.com/2019/12/12/regain-control-over-your-inbox-by-rejecting-email-with-a-custom-domain-wildcard-

Here’s a good guide on how to go about this :) https://btmiller.com/2019/12/12/regain-control-over-your-inbox-by-rejecting-email-with-a-custom-domain-wildcard-and-aliases.html https://btmiller.com/2019/12/12/regain-control-over-your-inb...