Question

我试图通过gmail smtp服务器通过java代码发送邮件，但面对java.net.SocketException: Connection Reset

以下是发送邮件的代码：-`

  Properties props = new Properties();
  props.put("mail.smtp.host",host);  //host is smtp.gmail.com
  if(host.equalsIgnoreCase("smtp.gmail.com"))
  {
      props.put("mail.smtp.socketFactory.port",port);
      props.put("mail.smtp.socketFactory.class",
              "javax.net.ssl.SSLSocketFactory");
      props.put("mail.smtp.auth", "true");
      props.put("mail.smtp.port",port);//port is 465

  }
  else
  {
      props.put("mail.smtp.auth", "true");
  }
  Session session = Session.getDefaultInstance(props,
          new javax.mail.Authenticator() {
      protected PasswordAuthentication getPasswordAuthentication() {
          return new PasswordAuthentication(uname,pwd);
      }
  });

      try {

          session.setDebug(true);
          MimeMessage message = new MimeMessage(session);

          message.setFrom(new InternetAddress(uname));

          message.addRecipient(Message.RecipientType.TO,new InternetAddress(toMail));

          message.setSubject(NewFolderName);
          System.out.println("Composing message body.");

          StringBuilder htmlStreamBuilder = new StringBuilder();
          // we create some html string here.....
          Multipart multipart = new MimeMultipart();

          MimeBodyPart htmlPart = new MimeBodyPart();
          MimeBodyPart attachmentPart= new MimeBodyPart();              

          DataSource source = new FileDataSource(filename);
          attachmentPart.setDataHandler(new DataHandler(source));
          attachmentPart.setFileName(KMAConstants.TESTNG_ATTACHMENT_FILE);

          htmlPart.setContent(htmlStream, "text/html; charset=utf-8");//we give some html stream here ....


          multipart.addBodyPart(htmlPart);
          multipart.addBodyPart(attachmentPart);


          message.setContent(multipart);

          Transport.send(message);



      } catch (MessagingException e)
      {

          System.out.println("Issue in message sending, MessagingExceptionn raised.");
          e.printStackTrace();

          throw e;
      }
  }

  `

它会抛出以下错误： - `

DEBUG：getProvider（）返回javax.mail.Provider [TRANSPORT，smtp，com.sun.mail.smtp.SMTPTransport，Oracle] DEBUG SMTP：useEhlo true，useAuth true DEBUG SMTP：useEhlo true，useAuth true DEBUG SMTP：试图连接到主机＆＃34; smtp.gmail.com＆＃34;，端口465，isSSL false DEBUG SMTP：异常阅读响应，THROW： java.net.SocketException：连接重置在java.net.SocketInputStream.read（SocketInputStream.java:209）在java.net.SocketInputStream.read（SocketInputStream.java:141） at com.sun.mail.util.TraceInputStream.read（TraceInputStream.java:124）在java.io.BufferedInputStream.fill（BufferedInputStream.java:246）在java.io.BufferedInputStream.read（BufferedInputStream.java:265） at com.sun.mail.util.LineInputStream.readLine（LineInputStream.java:89） at com.sun.mail.smtp.SMTPTransport.readServerResponse（SMTPTransport.java:2184） at com.sun.mail.smtp.SMTPTransport.openServer（SMTPTransport.java:1939） at com.sun.mail.smtp.SMTPTransport.protocolConnect（SMTPTransport.java:654）在javax.mail.Service.connect（Service.java:367）在javax.mail.Service.connect（Service.java:226）在javax.mail.Service.connect（Service.java:175）在javax.mail.Transport.send0（Transport.java:253）在javax.mail.Transport.send（Transport.java:124）在com.rsi.kma.common.utils.KmaUtil.sendMailNow（KmaUtil.java:1907）在com.rsi.kma.ui.testconfigureui.FileProcessingTask.call（FileProcessingTask.java:401）在com.rsi.kma.ui.testconfigureui.FileProcessingTask.call（FileProcessingTask.java:1）在javafx.concurrent.Task $ TaskCallable.call（Task.java:1423） at java.util.concurrent.FutureTask.run（FutureTask.java:266）在java.lang.Thread.run（Thread.java:745）邮件发送问题，MessagingExceptionn引发。

`

这里需要注意的一点是，此代码适用于某些计算机。

请帮帮我，提前谢谢。

Answer 1

网络政策阻止了对SMTP服务器的请求。我联系了我的网络管理员，他给了我所需的权限。现在一切正常。

通过gmail smtp服务器通过java发送邮件时java.net.SocketException

1 个答案: