Display all comments or recent comments per user on author page

your problem is using author_email, you need user_id:

i just use similar script.

<?php
    $args = array(
        'user_id' => get_the_author_meta('ID'),
        'number' => 10, // how many comments to retrieve
        'status' => 'approve'
        );

    $comments = get_comments( $args );

    if ( $comments )
    {
        $output.= "<ul>\n";
        foreach ( $comments as $c )
        {
        $output.= '<li>';
        $output.= '<a href="'.get_comment_link( $c->comment_ID ).'">';
        $output.= get_the_title($c->comment_post_ID);
        $output.= '</a>, Posted on: '. mysql2date('m/d/Y', $c->comment_date, $translate);
        $output.= "</li>\n";
        }
        $output.= '</ul>';

        echo $output;
    } else { echo "No comments made";}

?>