hi r.e.g. when things like this happen it can be sometimes someone or something doing it as a matter of course: e.g. automated code or a paid job. they don't always reply (but occasionally have) as it doesn't further their ends to do so or they don't hear the request. I infer you're planning to regain access to your account after the lock expires. i'm not familiar with gmx, but I know many respectable people use protonmail. cock.li and riseup.net also respectable and normal here. I kinda miss mailservers hosted on anonymity networks, or that forward mail associated with anonymity networks, or personally hosted ala freedombox. it can also be good to retranslate one's text or adopt different writing and posting styles when posting anonymously. there are some pretty powerful tools for that but i'm not really familiar with them.