无法在JavaMail中设置文本和添加附件

我是java mail的新手,我正在尝试发送一封带有文本和附件的电子邮件。下面是我的代码

String mail = "";          //enter email id
Message message = new MimeMessage(session);
message.setFrom(new InternetAddress(mail));
message.setRecipients(Message.RecipientType.TO,
InternetAddress.parse(MailReceipients.get(i)));
message.setSubject("Notification Mail");
MimeBodyPart attachment = new MimeBodyPart();
Multipart mp1 = new MimeMultipart();
attachment.attachFile("D;/file1.csv");
message.setText("Dear Sir/Madam,"+ "\n\n My Testing App Mail!");
mp1.addBodyPart(attachment);
message.setContent(mp1);
Transport.send(message);

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