Pseudoscientific journals, how to detect them?

The research evaluation system, which rewards publications in quality international journals, causes the appearance of “predatory” journals, which publish without scientific quality standards.

As explained in “Revistas seudocientíficas para engordar currículos académicos“, in addition, these are publishers who charge for the publication without the usual quality protocols.

What are the main characteristics of these magazines? How to detect them?:

• Spam: sending mass mails to scientists in which they are invited to publish.
• Foreign magazine titles: often publications that incorporate in the title the name of a country different from the one of publication to simulate another origin.
• Opaque rates: it is not clear what/when to pay.
• Members of unknown councils and with little information.
• They are not part of the prestigious databases. Or they are quickly expelled for malpractice.