This is so incredibly depressing.
I'm searching for this exact answer here and all I'm finding are posts asking the same question, over and over, all with no answers.
If anyone has any idea how to get WordPress to send an email with a password to a new user, who just registered, let me know.
There's nothing on my error log, I don't know what else to check.
I get an email saying "a new user has registered" but the user never gets the password email. I am testing this with emails I own, and so the email is 100% for sure NOT going into a spam folder.
I've looked and look in WP and cannot find any place to configure this!