Distinguish starting journals from predatory ones As you know, there are journals -predatory journals- which are just publishing scams, without actual peer review, etc. but look like genuine ones, and it is a problem for the honest researcher to avoid them.

Until recently there was a free blacklist, Jerry Beall's (which had flaws), and now there is Cabell's list, which apart from being behind a paywall, may not distinguish predatory journals from new ones (see this review).

As the number of publications seems ever-increasing, I feel new, legitimate journals will play an important role in next years. I would be willing to publish in one of them sometime, but I don't know how to identify them. For the moment being, each time I receive an email promoting a starting journal (as some may in good faith do), I just dismiss it as being a predatory one.

So the question is: Are there good ways of knowing that a new journal is legitimate? Perhaps is there some kind of white list?
Look at the editorial board. If it contains respectable, well-known researchers in the field, then it's likely to be a serious journal.