I've just found out about this issue. In the settings I have unchecked "Comment author must fill out name and e-mail" but when a user comments on a post without filling in an email the page it releoads and nothing happens, no comment is posted or shown.
When a comment is posted with an email it is added for moderation.
Does anybody know how to make email (and even name) optional form fields. On my site I feel that requiring an email address puts off some users from leaving comments.
Any help is appreciated.