Apple's Hide My Email feature is a joke.
1. When I send to a HME account, I get a bounce. Apple receives and accepts the email, verifies DMARC/DKIM&SPF, but then when apple's servers forward it, the final server bounces it as spam, and apple pass that back to the original sender. So we can't email people who used the feature.
2. In the bounce email from Apple it reveals ... the "hidden" email address! 👍 way to go, Apple!