When using the blog by e-mail feature, the post_status is always set to 'publish'. It would be helpful if this could be set to the new 'pending' status in 2.3.
The code in wp-mail.php says, "propose a way", so here it is:
Move the assignment statement $post_status = 'publish'; at wp-mail.php line 145 up before the apply_filters('phone_content', $content); call (line 134). This would allow someone to write a filter that could change the post_status, but keep the current behavior as default.