Question

I am using the following code to send mail

public class Mail
{
    public static void main(String[] args)
    {
                String[] to={"[e-mail]"};
                String[] cc={"[e-mail]"};
                String subject = "Subject";
                String body = "This is Body....!!";

        Mail.sendMail("[e-mail]","Password","smtp.gmail.com","465","true",
       "true",true,"javax.net.ssl.SSLSocketFactory","false",to,cc,
       subject,body);             
    }



  public synchronized static boolean sendMail(String userName,String passWord,String host,String port,String starttls,String auth,boolean debug,String socketFactoryClass,String fallback,String[] to,String[] cc,String subject,String text)
{
            Properties props = new Properties();
            //Properties props=System.getProperties();
    props.put("mail.smtp.user", userName);
    props.put("mail.smtp.host", host);
            if(!"".equals(port))
    props.put("mail.smtp.port", port);
            if(!"".equals(starttls))
    props.put("mail.smtp.starttls.enable",starttls);
    props.put("mail.smtp.auth", auth);
            if(debug){
            props.put("mail.smtp.debug", "true");
            }else{
            props.put("mail.smtp.debug", "false");         
            }
            if(!"".equals(port))
    props.put("mail.smtp.socketFactory.port", port);
            if(!"".equals(socketFactoryClass))
    props.put("mail.smtp.socketFactory.class",socketFactoryClass);
            if(!"".equals(fallback))
    props.put("mail.smtp.socketFactory.fallback", fallback);

    try
    {
                    Session session = Session.getDefaultInstance(props, null);
        session.setDebug(debug);
        MimeMessage msg = new MimeMessage(session);
        msg.setText(text);
        msg.setSubject(subject);
        msg.setFrom(new InternetAddress("[e-mail]"));
                    for(int i=0;i<to.length;i++){
        msg.addRecipient(Message.RecipientType.TO, new InternetAddress(to[i]));
                    }
                    for(int i=0;i<cc.length;i++){
        msg.addRecipient(Message.RecipientType.CC, new InternetAddress(cc[i]));
                    }
        msg.saveChanges();
                    Transport transport = session.getTransport("smtp");
                    transport.connect(host, userName, passWord);
                    transport.sendMessage(msg, msg.getAllRecipients());
                    transport.close();
                    return true;
    }
    catch (Exception mex)
    {
        mex.printStackTrace();
                    return false;
    }
    }

The code is working fine and the message is been sent. But I want to set a flag (like flag=false) if the messsage has not been sent (like when I try to send to [e-mail] since its not valid mail Id). Would really appreciate if someone could help me on this.

Thanks in advance

Answer 1

You will probably have to put an actual email in msg.setFrom() and check its inbox for a Non delivery report.

Most servers will try to send your email several times before giving up so you can’t figure out if the email is valid instantly.