We're still waiting for a response from the abuse department about a potential unlock. We apologize for the inconvenience caused.
We have blogged about the problem when providers like @netcup (in our case) rely on blocklists as the single source of truth, without second thought or verification.
This caused much trouble and headache for us, but the person who put us on the list due to a config error will likely never know it happened, after all.
https://blog.codeberg.org/how-blocklists-prevent-the-internet-to-be-decentralized-and-safe.html