Problem is solved. Thank you. Maybe it helps someone else. The problem is that the posts are subject to admin approval. E-mail will not be sent ...

@sofy Thank you for answer. I have already tested all of these. I'm wondering if there is a setting that allows or prevents the user from receiving e-...

Thank you for your answer. The content of the $post array is as follows. Which one here is the ID of the user who created the topic. The userid key in...