We check this website, now mz-web.de is up and dont blocked for our system and other users of the Internet.
So, answer to question: Is mz-web Down Right Now? - NO! mz-web is up!
If you have problem with access to site mz-web, and domain mz-web.de is not avalible.
Clear browser cache and/or try other web browser
(Chrome, Firefox or Safari).