请参见此挂钩：register_post

add_action(\'register_post\', \'ban_email_2334\', 10, 3);

function ban_email_2334( $username, $email, $errors ){

    $result = array();

    // check if email is from the provider you wish to ban
    preg_match(\'/bannedprovider.com/i\', $email, $result);

    if( !empty( $result )){
        $errors->add(\'spam_email\', __( \'Some choicest abuses you might want to pass on\' ));
    }

    return;

}