使用javamail发送邮件

Question

public class Email {
    public Email() {
        super();
    }
    public void sendmail(String smtp, String from, String to, String subject, String body){
        Session session;
        MimeMessage message;
        Properties props = System.getProperties();
        props.put("mail.smtp.host", smtp);
        session = Session.getInstance(props, null);
        message = new MimeMessage(session);
        try{
            message.setFrom(new InternetAddress(from));
            message.addRecipient(Message.RecipientType.TO, new InternetAddress(to));
            message.setSubject(subject);
            message.setText(body);
            Transport transport = session.getTransport("smtp");
            transport.send(message);
            System.out.println("send successfully");
        }catch(MessagingException e){
            e.getMessage();
        }
    }}