Yes I found out that it was just that Maxbulk M. that was faulty. I downloaded a new and then it was working.
Now I am looking for a good tutorial how to get CSS working with hotmail and gmail. I know there is some things you can do to make it work.
Also I am looking for the best way to configure the headers in Maxbulk M. like X_Mailer, MIME_Version etc. for not being caught a spam.