mycustomdomain.com

Receiving Spam with Custom Domain in Fastmail Is there any way to combat this? My custom domain is probably a little over a month old, I do have catch all on. I am getting it on multiple domains and I only really use one as of now. Some emails use [randomletters@mycustomdomain.com](mailto:randomletters@mycustomdomain.com), others use popular terms like contact@mydomain, some say test with numbers behind it@mydomain. To all the people I've read about on reddit who don't get spam on their longstanding custom domains with catchalls- How are you doing it? Is there something I can do to prevent it?