SmtpSender smtp=SmtpSender.getInstance();
   MailToBeSent send=new MailToBeSent();
   send.setSubject("Hello");
   send.setFromAddress("some@bar.com","Someone");
   send.addToAddress("another@foo.com","Anotherone");
   send.setBody("Hello, test with the file attachment!");
   byte[] bin=.....
   send.attacheFile(bin,"photo.jpg","image/jpeg");
   smtp.sendMail(send);