Question

我在网页上有一个链接，可以从localhost SMTP发送电子邮件，并使用我在How to create an in-memory PDF report and send as an email attachment using iText and Java之后创建的iText创建的pdf附件，但它正在运行，但是当我收到电子邮件时，我看不到发件人名称/地址。

它显示为来自我的Gmail收件箱中的“（未知发件人）”，如果我点击回复，则“收件人”框完全空白。在hotmail中显示来自“（未知）”，但是当我打开它时，发件人显示为“admin@whatever.com代表（未知）”

当我通过telnet测试服务器上的SMTP时，我编写的发件人名称就好了。如何在应用程序发送电子邮件时显示它？

以下是发送电子邮件的代码：

    String smtpHost = "localhost";
    int smtpPort = 25;
    String sender = "admin@whatever.com";
    String[] recipient = pdfEmail.replaceAll("\\ ", "").split(",");
    String content = "whatever"; 
    String subject = "whatever"; 

    Properties props = new Properties();
    props.put("mail.smtp.host", smtpHost);
    props.put("mail.smtp.user", sender);
    props.put("mail.smtp.port", smtpPort);

    Session session = Session.getDefaultInstance(props, null);

    ByteArrayOutputStream outputStream = null;

    try {          
        //construct the text body part
        MimeBodyPart textBodyPart = new MimeBodyPart();
        textBodyPart.setText(content);

        //now write the PDF content to the output stream
        outputStream = new ByteArrayOutputStream();
        writePdf(outputStream); //creates PDF
        byte[] bytes = outputStream.toByteArray();

        //construct the pdf body part
        DataSource dataSource = new ByteArrayDataSource(bytes, "application/pdf");
        MimeBodyPart pdfBodyPart = new MimeBodyPart();
        pdfBodyPart.setDataHandler(new DataHandler(dataSource));
        pdfBodyPart.setFileName("test.pdf");

        //construct the mime multi part
        MimeMultipart mimeMultipart = new MimeMultipart();
        mimeMultipart.addBodyPart(textBodyPart);
        mimeMultipart.addBodyPart(pdfBodyPart);

        //create the sender/recipient addresses
        InternetAddress iaSender = new InternetAddress(sender);     
        InternetAddress[] toAddress = new InternetAddress[recipient.length];

        // To get the array of addresses
        for( int i=0; i < recipient.length; i++ ) { 
            toAddress[i] = new InternetAddress(recipient[i]);
        }

        //construct the mime message
        MimeMessage mimeMessage = new MimeMessage(session);

        for( int i=0; i < toAddress.length; i++) { 
            mimeMessage.addRecipient(Message.RecipientType.TO, toAddress[i]);
        }

        mimeMessage.setSender(iaSender);
        mimeMessage.setSubject(subject);
        mimeMessage.setRecipients(Message.RecipientType.TO, toAddress);
        mimeMessage.setContent(mimeMultipart);

        //send off the email         
        Transport.send(mimeMessage);

    } catch(Exception ex) {
        ex.printStackTrace();
    } finally {
        //clean off
        if(null != outputStream) {
            try { outputStream.close(); outputStream = null; }
            catch(Exception ex) { }
        }

    }
}

Answer 1

尝试使用mimeMessage.setFrom(...)代替mimeMessage.setSender(...)。

Answer 2

试试这个

  var email = new MimeMessage();
  email.From.Add(MailboxAddress.Parse(request.From));

（未知发件人）从java应用程序发送带有在iText中创建的pdf附件的电子邮件时

2 个答案: