Java SMTP Client and Outlook unique behaviour

Question

Hi
I have written a simple Java client to send a mail with an attachment to a mail address. Its a normal Java SMTP client with multi part file attachment.
There is a unique behavior happening which is eating my head for some time now. The issue here is that when i try to send an attachment from my Outlook the message is being delivered to the recipient successfully in recipients inbox. But when i send the same attachment through my standalone Java client its not getting delivered to the recipient(not 100 % sure, spamming maybe).The client is not throwing any exception also so its become very hard as to whats going on as i think the mail is getting delivered but not sure. The recipient email address is on a Linux box so don't know how to access it. please help me on this.
Thanks
Vikeng21

Answer 1

Hi EJP , Below is the code that i have written for the same
import java.io.File;
import java.util.Properties;
import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.mail.Address;
import javax.mail.BodyPart;
import javax.mail.Message;
import javax.mail.Multipart;
import javax.mail.Part;
import javax.mail.SendFailedException;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
public class msgshow {
public static void main(String[] args) throws Exception {
     String host = "***hostname***";
     String from = "***fromEmailId***";
     String to = "***toEmailId****";
     String filename = "log.txt";
     try{
          // Get system properties
          Properties props = System.getProperties();
          // Setup mail server
          props.setProperty("mail.smtp.host", host);
          //Doing this for testing as the properties are being set by using default system user properties.If user authentication is required
          boolean authValue = true;
          if(authValue){
               props.setProperty("mail.user", "***username***");
               props.setProperty("mail.password", "***password***");
          props.setProperty("mail.debug", "true");
          // Get session
          javax.mail.Session session = javax.mail.Session.getInstance(props, null);
          // Define message
          Message message = new MimeMessage(session);
          message.setFrom(new InternetAddress(from));
          message.addRecipient(Message.RecipientType.TO,
          new InternetAddress(to));
          message.setSubject("VVVVVVVVSSSSSSSSSS");
          // Create the message part
          BodyPart messageBodyPart = new MimeBodyPart();
          // Fill the message
          messageBodyPart.setText("Here's the file");
          // Create a Multipart
          Multipart multipart = new MimeMultipart();
          // Add part one
          multipart.addBodyPart(messageBodyPart);
          // Part two is attachment
          // Create second body part
          messageBodyPart = new MimeBodyPart();
          // Get the attachment
          DataSource source = new FileDataSource(filename);
          // Set the data handler to the attachment
          messageBodyPart.setDataHandler(new DataHandler(source));
          //before setting the file name we have to set the proper file name
          final File individualFile = new File(filename);
          String fname = individualFile.getName();
          // Set the filename
          messageBodyPart.setFileName(fname);
          messageBodyPart.setDisposition(Part.ATTACHMENT);
          // Add part two
          multipart.addBodyPart(messageBodyPart);
          // Put parts in message
          message.setContent(multipart);
          // Send the message
          Transport.send(message);
          System.out.println("Message is sent");
     }catch(SendFailedException e){
          System.out.println("------------ Send Failed Exception -----------");
          Address adr[] = e.getValidSentAddresses();
          for(int i = 0; i < adr.length;i++){
               System.out.println("------- Valid Sent address" + adr);
          Address adr1[] = e.getValidUnsentAddresses();
          for(int j = 0; j < adr1.length;j++){
               System.out.println("------- Valid Sent address" + adr[j]);
          e.printStackTrace();          
     }catch(Exception ez){
          ez.printStackTrace();