WordPress at a glance
filter is not described

comment_moderation_recipients filter-hook . WP 3.7.0

Filters the list of recipients for comment moderation emails.

Usage

add_filter( 'comment_moderation_recipients', 'filter_function_name_1712', 10, 2 );
function filter_function_name_1712( $emails, $comment_id ){
	// filter...

	return $emails;
}
$emails(array)
List of email addresses to notify for comment moderation.
$comment_id(int)
Comment ID.

Where the hook is called

wp_notify_moderator()
wp-includes/pluggable.php 1702
$emails = apply_filters( 'comment_moderation_recipients', $emails, $comment_id );

Where the hook is used (in WP core)

Does not used.