Hi again !
You're very welcome ! :-)
Mail's Junk Mail filter should still work in automatic mode. Would you think that it is not the case on your Mac, switch back temporarily to training mode and see if you can train it more easily.
Would it work, a corrupted cache file may have prevented it from doing its work properly. In that case, the switch should take care of it.
Would it still not work, you can create a rule for these messages. However, before doing so, it is worth checking what may be raising an issue with Mail -- for example, is their syntax extremely elaborate, do they use a mix of languages ?
Let me know if it helps !