[efiecho]

I'm very interested about the aliases, but I'm not sure that I understand it correctly. I have a [e-mail] address, does this mean that I can also register [e-mail] and [e-mail] as an alias on my account, and it will seem like I have three accounts and recipients will never known about [e-mail] if I send from one of the two aliases? Do I then also "own" [e-mail] and [e-mail] in the same way I "own" [e-mail] while a customer?. If understood correctly, I could register an alias for mailing lists, and disable it if too much spam is received without ruining my main address.

[neither_color]

Yes, exactly. As long as the name is available. They all forward to the same inbox and if you use the web interface then fastmail knows to reply from the same alias as well.