In most cases there are no restrictions where you can publish, but you simply know the fact that evaluation committees will look down upon papers published in a

In most cases there are no restrictions where you can publish, but you simply know the fact that evaluation committees will look down upon papers published in a venue that is not among the respected ones. Some institutions, and in some cases governments, have a white-list of venues that are considered worthy to publish, so sending a paper to a venue that is not on the white-list will get it evaluated with 0 points. And you will be looked down upon by your colleagues, if you have such papers in your CV. Publishing the same stuff at several places is considered self-plagiarism, but probably this was not what was your question about.