Avoiding Predatory Publishers
Predatory publishers are not always open access and will not all look alike, but they may share some of these characteristics (btw low quality publishers can share these characteristics as well).
OA Journal Gatekeepers
A couple of directories of open access publications have taken on the job of acting as gatekeepers. If a journal appears on one of these lists, it has been vetted, to a certain extent. Although they can make mistakes, this may be a good place to start your investigation. But beware. Not all predatory journals are open access. You will need to evaluate any journal before submitting for publication.
Articles of Interest
Kolata, G. (2017, October 30). Many academics are eager to publish in worthless journals. The New York Times. Retrieved from https://www.nytimes.com
Butler, D. (2013, March 27). Investigating journals: The dark side of publishing. Nature, 495, 433-435.
Stratford, M. (2012, March 4). 'Predatory' online journals lure scholars who are eager to publish. Chronicle of Higher Education.
Johnson, C.Y. (2013, October 3). Bogus science paper accepted by dozens of journals. Boston.com.