We have a problem with very intrusive mailing from Chinese companies. They write from different e-mail addresses, from different IPs. We usually respond politely: „The gravity of the situation has led us to reassess our criteria for choosing business partners, particularly in light of our commitment to socially responsible and ethical practices”. We write to them that we cannot cooperate with Chinese companies (we spit in their faces, but they behave as if it was raining). They are sending more and more messages and spamming our e-mails.