They work by giving you a random email address that is available for a short time (ex. 10min) and an inbox for any messages you recieve during that time (ex. an email verification message from a Lemmy server)
I didn’t want to recommend a specific one, however Googling “temporary email” should give you several options to choose from.
Are you referring to Hide My Email, or using your own domain on Apple’s mail forwarding servers?
yes, hide my email thank you. it’s all part of the apple relay service so I used the general name!