All of these domains are already widely known because Guerrilla Mail are the ones actually running the email service, his website is a wrapper with a CORS proxy

All of these domains are already widely known because Guerrilla Mail are the ones actually running the email service, his website is a wrapper with a CORS proxy. He doesn't own or operate the cors proxies, mail infra, domains or the api https://www.guerrillamail.com https://www.guerrillamail.com And the entire app was just generated with https://aistudio.google.com https://aistudio.google.com (check view-source: and you'll see "aistudiocdn.com" for all the imports)