Index: src/wp-includes/comment.php
===================================================================
--- src/wp-includes/comment.php	(revision 38890)
+++ src/wp-includes/comment.php	(working copy)
@@ -3003,7 +3003,7 @@
 	$max_lengths = wp_get_comment_fields_max_lengths();
 
 	if ( get_option( 'require_name_email' ) && ! $user->exists() ) {
-		if ( 6 > strlen( $comment_author_email ) || '' == $comment_author ) {
+		if ( '' == $comment_author_email || '' == $comment_author ) {
 			return new WP_Error( 'require_name_email', __( '<strong>ERROR</strong>: please fill the required fields (name, email).' ), 200 );
 		} elseif ( ! is_email( $comment_author_email ) ) {
 			return new WP_Error( 'require_valid_email', __( '<strong>ERROR</strong>: please enter a valid email address.' ), 200 );