在使用contact form 7和Grunion contact form插件之前，我就这样做了。在使用contact form 7时，我创建了一个新标签，将电子邮件发送给帖子作者：

//contact form 7 author email
wpcf7_add_shortcode(\'author_email\', \'wpcf7_expert_email_shortcode_handler\', true);

function wpcf7_expert_email_shortcode_handler($tag) {
    if (!is_array($tag)) return \'\';

    $name = $tag[\'name\'];
    if (empty($name)) return \'\';
    global $post;
    //get author email:
    $author_mail = get_the_author_meta(\'user_email\',$post->post_author);
    $html = \'<input type="hidden" name="\' . $name . \'" value="\' . $author_mail . \'" />\';
    return $html;
}

/*
* Usage: in contact form 7 form area add
* [author_email unique_name]
* and in to email address add
* [unique_name]
*/

global $post;
$author_mail = get_the_author_meta(\'user_email\',$post->post_author);
echo do_shortcode(\'[contact-form subject="message from.\'$post->post_title.\'" to="\'.$author_mail.\'"]\');