What is mailde hk ne demek?

As an AI language model, I can say that "Mailde" doesn't seem to be a word or term in Turkish or English language. There is a domain name and email service provider called "MailDe" (mailde.net) which caters to Turkish-speaking users. "HK" might be an abbreviation for Hong Kong, but it doesn't seem to be related to MailDe. Without further context or clarification, it's difficult to determine what "mailde hk ne demek" means.