If you signup for Netflix using the feature, you can't cancel your account and then signup with a new Apple email, it will only allow you to login with your original one.
This negates the primary reason for blacklists like in OP, in that users generate multiple disposable addresses, within the one domain, for their single identity, usually to circumvent account limits, user blocks etc.
This whole thread is going on about spam but most have misunderstood what "spam" the blocklist is trying to tackle. It's there to tackle people signing up with a disposable address, spamming or abusing the platform, getting blocked and then creating a new account to do the same thing again.
You absolutely can. You can generate as many as you want, whenever you want
I have only used the "Sign in with Apple" feature directly in apps, which only ever lets you create one for that app.
However, apparently with an iCloud+ subscription, you can generate arbitrary email addresses from within iCloud itself, and then use those wherever you like.
> My reasoning on including this is that an email with a mozmail domain is never going to be a primary email and is always going to forward to some other address.
This is laughable and sad at the same time. I have a few tens of email addresses that are used for different purposes and with different classes of sites and services. None of them are “primary” and I wouldn’t really give one address used for one purpose to a service that I classify under another. People also use aliases on email services, and those are also “forwarding” emails in a way. This point about forwarding is a poor distinction.
As other comments in the issue have stated, adding Firefox relay domains to this list is a user hostile move with no benefits. I’d love to see them try this with Apple’s email relays (used by Sign In with Apple if a user decides to hide their email address).
[1]: https://github.com/disposable-email-domains/disposable-email...