Javax.mail CSV file attachment corrupt?

Question

I'm having some trouble with attaching a file to an outgoing email, it's a CSV file and when it is uploaded/attached to the email, it becomes "corrupt". Excel will still open it but if I open it in notepad the formatting is noticeably messed up. I need it to retain all the correct return carriages and line feeds, which I believe are what are getting mingled. (Another program must read it and this formatting is messing everything up).
Here's the code:
MimeBodyPart messageBodyPart =
                 new MimeBodyPart();
         //fill message
         messageBodyPart.setText(outBoundMessage);
         Multipart multipart = new MimeMultipart();
         multipart.addBodyPart(messageBodyPart);
         if (fileAttachment != null) {
            // Part two is attachment
            MimeBodyPart attachment = new MimeBodyPart();
            attachment.attachFile(fileAttachment);
            attachment.setFileName(fileAttachment.getName());
            attachment.setHeader("type", "text/csv");
            multipart.addBodyPart(attachment);
         // Put parts in message
         message.setContent(multipart);The other parts of the message are being created and attached where necessary. My guess is that it's not transferring in binary? I've never really done this sort of thing so if anyone could lend a hand and show me how to properly attach files so they don't get altered in anyway I would greatly appreciate it.

Answer 1

Hi,
I am sending csv file as an attachment by using below code
import java.util.*;
import java.io.*;
import javax.mail.*;
import javax.mail.internet.*;
import javax.activation.*;
public class AttchmtMail
    String finaldt;
        public  void mailAtchmt(String fname,String dt) {
            String   to="[email protected]";
           String from = "[email protected]";
          String to2="[email protected]";
             String host = "xxx.xx.xxx.xxx";
            // Create properties, get Session
            Properties props = new Properties();
            // If using static Transport.send(),
            // need to specify which host to send it to
            props.put("mail.smtp.host", host);
            // To see what is going on behind the scene
            props.put("mail.debug", "true");
            Session session = Session.getInstance(props);
            try {
                // Instantiatee a message
                Transport bus = session.getTransport("smtp");
                bus.connect();
                Message msg = new MimeMessage(session);
                //Set message attributes
                msg.setFrom(new InternetAddress(from));
                InternetAddress[] address = {new InternetAddress(to),new InternetAddress(to2)};
                msg.setRecipients(Message.RecipientType.TO, address);
                msg.setSubject("New OU's on "+dt+".");
                msg.setSentDate(new Date());
               // String filename= "C:/Feeds/"+finaldt+"/"+files;
String file1= fname;
File f1=new File(file1);
if(f1.exists())
setFileAsAttachment(msg, file1);
else
//setFileAsAttachment(msg,"","",info);
msg.saveChanges();
bus.sendMessage(msg, address);
bus.close();
catch (MessagingException mex) {
// Prints all nested (chained) exceptions as well
mex.printStackTrace();
// How to access nested exceptions
while (mex.getNextException() != null) {
// Get next exception in chain
Exception ex = mex.getNextException();
ex.printStackTrace();
if (!(ex instanceof MessagingException)) break;
else mex = (MessagingException)ex;
public void setFileAsAttachment(Message msg, String filename)
throws MessagingException {
// Create and fill first part
MimeBodyPart p1 = new MimeBodyPart();
p1.setText("Dear ,\n\nPlease check the attachment " );
// Create second part
MimeBodyPart p2 = new MimeBodyPart();
// Put a file in the second part
if(!filename.equals(""))
FileDataSource fds = new FileDataSource(filename);
p2.setDataHandler(new DataHandler(fds));
p2.setFileName(fds.getName());
// Create the Multipart. Add BodyParts to it.
Multipart mp = new MimeMultipart();
mp.addBodyPart(p1);
if(!filename.equals(""))
mp.addBodyPart(p2);
} // Set Multipart as the message's content
msg.setContent(mp);
}//End of class
Madhu