I can't send email in my web application, something is wrong with 
MimeMessage message = javaMailSender.createMimeMessage(); line, here is a code:
MailSender:
private JavaMailSender javaMailSender;  
public void send(String from, String to, String subject, String body)  throws MessagingException {
    MimeMessage message = javaMailSender.createMimeMessage();
    MimeMessageHelper helper;
    helper = new MimeMessageHelper(message, true); 
    helper.setFrom(from);
    helper.setSubject(subject);
    helper.setTo(to);
    helper.setText(body, true); 
    javaMailSender.send(message);   
}
Error:
 SEVERE: Servlet.service() for servlet [spring-dispatcher] in context with path [/OnlineShop] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause
java.lang.NullPointerException
at com.damian.model.MailSender.send(MailSender.java:19)
