if(!empty($_POST)){
        foreach($_POST['ck'] as $ck){
            $msg = "<img src="http://www.site.com.br/images/$ck"width="100px" height="70px"><br>";

                // manda e-mail usuario
                $mail = new PHPMailer();
                $mail-> IsSMTP();
                $mail->CharSet = "UTF-8";
                $mail->SMTPAuth = true;
                $mail->SMTPSecure = 'tls';
                $mail->Port = 587;
                $mail->Host = "smtp.zoho.com";
                $mail->Username = "usuario@exemplo.com";
                $mail->Password = "senha";
                $mail->SetFrom("usuario@exemplo.com", "usuario");

                $mail->AddAddress("recebedor@exemplo.com", "usuario");
                $mail->Subject = "assunto";
                $mail->msgHTML($msg);

                if($mail->send()){
                    echo "enviado com sucesso";
                    exit();
                }else{
                    echo "Erro ao enviar o email".$mail->ErrorInfo;
                }
            }

    }