How to send java mail with big file attached

[vishal kulkarni]

Hi

I have written an application using java swings and java mail to send .zip file as an attachment through java mail. The zip file contains mp3 files. I am selecting the zip file from local disk using jfilechooser. The application working perfectly, but it is taking 10 to 15 minutes to send mail with 2mb file attached.

the code to attach file is:

  protected void addAtachments(String[] attachments, Multipart multipart)
	            throws MessagingException, AddressException, IOException {
                System.out.println("attaching");
	        for (int i = 0; i <= attachments.length - 1; i++) {
	            String filename = attachments[i];
                      
	            MimeBodyPart attachmentBodyPart = new MimeBodyPart();
	            //use a JAF FileDataSource as it does MIME type detection
	           DataSource source = new FileDataSource(filename);
                 
	            attachmentBodyPart.setDataHandler(new DataHandler(source));
                   
	            attachmentBodyPart.setFileName(filename);

	            //add the attachment
	            multipart.addBodyPart(attachmentBodyPart);
                     
	        }

is there any way we can increase the performance.
Please reply to this post i am trying it from last 3 day's without success.

[Pranav Raulkar]

Hi Vishal,

One way to increase performace is to do the attachment activity in seperate thread for each attachment.
The only thing you might need to watch out for is weather all the attachments have been attached when user tries to send the mail.

Hope this helps.