雅虎和 Gmail 未收到从 Java 发送的电子邮件答案

【问题标题】：Emails sent from Java not received at Yahoo & Gmail雅虎和 Gmail 未收到从 Java 发送的电子邮件
【发布时间】：2014-06-16 23:53:02
【问题描述】：

我有一个问题，Java 中的一段代码可以正常发送电子邮件，但雅虎和 Gmail 等公共电子邮件除外。

以下是我发送到公司电子邮件地址时收到的电子邮件的标题：

Date: Wed, 30 Apr 2014 10:56:05 -0400
From: <test@mycompany.com>
To: <testmycompany@gmail.com>
Message-ID: <743410318.7.1398869765575.JavaMail.test@test-win7>
Subject: Order Attached
MIME-Version: 1.0
Content-Type: multipart/mixed;
    boundary="----=_Part_6_255846116.1398869765268"
X-MS-Exchange-Organization-AVStamp-Mailbox: SMEXtG}w;1076300;0;This mail has
 been scanned by Trend Micro ScanMail for Microsoft Exchange;
X-MS-Exchange-Organization-SCL: 0
X-EsetId: B021473D1D017139E26C16

这是java代码：

MimeMessage msg = new MimeMessage(mailSession);
      msg.setHeader("Content-Type", getContentType(email.getContentType()));
      msg.setFrom(getInternetAddress((email.getFrom() == null || email.getFrom().getEmail() == null) ? new EmailAddress(emailConfiguration.getDefaultFromEmail()) : email.getFrom()));
      msg.setRecipients(Message.RecipientType.TO, getRecipientArray(email.getRecipients()));
      msg.setSubject(email.getSubject(), getContentType(email.getContentType()));
      msg.setSentDate(new Date());
  if (email.getAttachments() == null || email.getAttachments().size() == 0) {
    msg.setContent(new String(email.getBody()), getContentType(email.getContentType()));
  } else {
    MimeMultipart body = new MimeMultipart();
    email.setBody("This is a new Vendor Order.\nPlease respond.");
    if (email.getBody() != null && email.getBody().length > 0) {
      MimeBodyPart textPart = new MimeBodyPart();
      textPart.setContent(new String(email.getBody()), getContentType(email.getContentType()));
      body.addBodyPart(textPart);
    }
    for (EmailAttachment attachment: email.getAttachments()) {
      MimeBodyPart part = new MimeBodyPart();
      InMemoryDataSource fds = new InMemoryDataSource(attachment);
      part.setDataHandler(new DataHandler(fds));
      part.setFileName(fds.getName());
      body.addBodyPart(part);
    }
    msg.setContent(body);
  }

  transport = mailSession.getTransport(msg.getFrom()[0]);
  Socket socket = new Socket(emailConfiguration.getMailHost(), emailConfiguration.getMailPort());
  socket.setSoTimeout(emailConfiguration.getIdleTimeoutInSeconds() * 1000);
  if (connectionListener != null) {
    connectionListener.setSocket(socket);
  }
  ((SMTPTransport)transport).connect(socket);
  transport.sendMessage(msg, msg.getRecipients(Message.RecipientType.TO));

有没有什么让你跳出来但可能从标题中遗漏的东西？

【问题讨论】：

标签： java email content-type email-attachments email-headers

【解决方案1】：

您应该检查邮件服务器的响应。我曾经尝试连接到 gmail 服务器以检查邮件地址的存在，但它不起作用，因为我的 ISP 的 ip 块被列入黑名单以避免来自受感染家庭计算机的垃圾邮件。我忘记了链接，但是有一个网站可以检查你的ip是否被列入黑名单。

【讨论】：