As I previously mentioned, there are people busy spamming every inch of the internet with all kind of links. I have renamed the submit-page and the feedback-page, just to keep them away. At first I started to block them on a daily basis, but I stopped at 757 different addresses. I must have done something right, because that's when another type of spam flowed into my mailbox: someone is sending spam with faked return email-addresses that point to this domain. So now I get all kinds of "delivery failed" messages. I rerouted all mail to non-existing users to an account that has it mail deleted after 7 days, so that takes care of those. Even virusses use this domain as a return-address, the virus is named W32.Mixor.q (Numar).