I have the same problem as mentioned above.
In my settings i have “E-mail me whenever: Anyone posts a comment” on. But i never get a message in my mailbox. The strange thing is that, when i turn on “An administrator must approve the comment” i do get messages to approve in my mailbox.
When i use the registration option, accounts are made but users dont get a notification in their mailbox.
Can anyone help me with this problem?