my IP address has been blocked by the web.
https://cleantalk.org/blacklists/79.106.227.243

how to find the place where spam is.
how to block this spam

Monitor your users to see who is accessing the mail sites listed under "Sender Email".

Monitor your users to see who is accessing the mail sites listed under "Sender Email".

how to act to do this,
I'm a beginner.