[protonmail]

An additional email address is required only in cases when our system detects something suspicious about your network, so if you are coming across this, we recommend changing nodes. If you keep coming across the same issue, please contact us at: https://proton.me/support/contact, so we can take a closer look.

The email addresses, however, are not tied to your account - we only save a cryptographic hash of your email address. Due to the hash functions being one-way, we cannot derive your data back from the hash: https://proton.me/support/human-verification.

[hackideiomat]

Who cares if you hash it, cracking a hash of an e-mail is easy AF compared to passwords. Especially on agency scale... How do you hash it? Argon2 or rather some extremely fast to crack hash?