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Comment by kornakiewicz | Hacker News Reader

I migrated about one year ago and this is a feature I really love. Every service has unique address and goes to separate folder via rules.

Also, there are automatic aliases when you use your own domain. Say, you have name@domain.com, then all *@name.domain.com are also working aliases, like spotify@name.domain.com. Really neat feature.

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That feature is basically the killer feature for me. I sign up for each service with a custom email and password, and save both in pass or any other pwd manager. It makes it super easy to see which service leaked your email when you get unrelated spam. I wonder whether such an occasion would be grounds for a court case against said company under GDPR.

Don't all mail service providers that allow a custom domain allow for creating a catch all email?

It's not exactly a catchall; it's per user, and you can also set up rules to route to different folders based on receiving address. If there are 2 users 'joe' and 'bob' on the domain 'foo.com', joe can use any '* @joe.foo.com' address and bob can use any '* @bob.foo.com' address. Fastmail pricing is per user.

Side note: Both joe and bob would have trouble proving in court that their addresses were sold, not guessed.

what if each local part was something long & random?

Individually, it doesn't seem convincing, but if you find multiple instances (individuals), in their own different styles, and all the addresses are in the same mailing list... I think it can have significant weight. Alternative would be what? Someone framing the service provider? Or joe and bob and maybe others staging it? Possible, but frankly, not very likely. I think the service provider would have at least have some explaining to do.

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