Attachments were missing when mail was sent through java mail API

[Malathi]

Dear Experts,

Our web application is based on struts and we are using java mail API to send mails to USA clients through our application.The problem is, they could able to receive the mail but they coudn't able to receive the attachments.

Could you please let me know the problem behind that ASAP

Regards,
Malathi

[Eranga]

Better you should provide more details. How did you do that, and what happen(any observations) when you receive a mail with an attachment? And such details much helpful to others, commenting on.

[Malathi]

Properties props = System.getProperties();
props.put("mail.smtp.host", "10.0.1.6");
Session session1 = Session.getDefaultInstance(props, null);
MimeMultipart multipart = new MimeMultipart("related");
MimeMessage message = new MimeMessage(session1);
message.setFrom(new InternetAddress(mailFromAddress));
message.setSubject(mailSubject);
MimeBodyPart messageBodyPart1 = new MimeBodyPart();
messageBodyPart1.setContent(mailContent, "text/html");
multipart.addBodyPart(messageBodyPart1);

FileDataSource fds1 = new FileDataSource(pdfFilePath);
MimeBodyPart messageBodyPart2 = new MimeBodyPart();
messageBodyPart2.setDataHandler(new DataHandler(fds1));
messageBodyPart2.setFileName(fds1.getName());
multipart.addBodyPart(messageBodyPart2);
message.setContent(multipart);
message.addRecipient(Message.RecipientType.TO,new InternetAddress("malathi@gmail.com"));
message.addRecipient(Message.RecipientType.CC,new InternetAddress(maatharasi@gmail.com));
Transport.send(message);

it is sending for few users the mail with attachments correctly but for few users, it is sending the mail but it is missing the attachments.

let me know if anybody is knowing the solution ASAP because the application is running in live server