通过JavaMail发送到Gmail时的TLS问题 [英] TLS issue when sending to gmail through JavaMail

问题描述

事实证明，JavaMail比我想象的更加令人沮丧。我已经在线看了几个关于如何通过Gmail的服务器（但不是通过SSL）发送简单SMTP邮件的例子。在尝试了几个不同的代码示例后，当我调用 transport.connect（）时，我会继续总结出同样的例子。我不断得到这个堆栈跟踪：

 线程main中的异常com.sun.mail.smtp.SMTPSendFailedException：530 5.7。 0必须首先发出STARTTLS命令。 com.un.mail.smtp.SMTPTransport.issueSendCommand（SMTPTransport.java:2057）
 com.sun.mail.smtp.SMTPTransport.mailFrom（SMTPTransport.java:1580）
 
 at com.sun.mail.smtp.SMTPTransport.sendMessage（SMTPTransport.java:1097）
在SendEmail.main（SendEmail.java:47）
  

有人可以告诉我我应该添加还是修改这个？

这是我的代码：

 属性props = new Properties（）; 
 props.put（mail.transport.protocol，smtp）; 
 props.put（mail.host，smtp.gmail.com）; 
 props.put（mail.user，[e-mail]）; 
 props.put（mail.password，blah）; 
 props.put（mail.port，587）; 
 
会话mailSession = Session.getDefaultInstance（道具，null）; 
运输transport = mailSession.getTransport（）; 
 
 MimeMessage message = new MimeMessage（mailSession）; 
 message.setSubject（这是一个测试）; 
 message.setContent（这是一个测试，text / plain）; 
 message.addRecipient（Message.RecipientType.TO，new InternetAddress（[e-mail]））; 
 
 transport.connect（）; 
 transport.sendMessage（message，message.getRecipients（Message.RecipientType.TO））; 
 transport.close（）; 
  

解决方案

您需要启用 STARTTLS 。在您的配置中再添加一个属性：

  props.put（mail.smtp.starttls.enable，true） ; 
  

Turns out that JavaMail is a bit more frustrating than I thought it would be. I've looked at several examples online on how to send a simple SMTP email through Gmail's servers (but not through SSL). After trying several different examples of code, I keep concluding to the same example exception when I call transport.connect(). I keep getting this stack trace:

Exception in thread "main" com.sun.mail.smtp.SMTPSendFailedException: 530 5.7.0 Must issue a STARTTLS command first. l10sm302158wfk.21
     at com.sun.mail.smtp.SMTPTransport.issueSendCommand(SMTPTransport.java:2057)
     at com.sun.mail.smtp.SMTPTransport.mailFrom(SMTPTransport.java:1580)
     at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:1097)
     at SendEmail.main(SendEmail.java:47)

Can someone please tell me what I should add or do to fix this?

Here is my code:

    Properties props = new Properties();
    props.put("mail.transport.protocol", "smtp");
    props.put("mail.host", "smtp.gmail.com");
    props.put("mail.user", "[e-mail]");
    props.put("mail.password", "blah");
    props.put("mail.port", "587");

    Session mailSession = Session.getDefaultInstance(props, null);
    Transport transport = mailSession.getTransport();

    MimeMessage message = new MimeMessage(mailSession);
    message.setSubject("This is a test");
    message.setContent("This is a test", "text/plain");
    message.addRecipient(Message.RecipientType.TO, new InternetAddress("[e-mail]"));

    transport.connect();
    transport.sendMessage(message, message.getRecipients(Message.RecipientType.TO));
    transport.close();

解决方案

You need to enable STARTTLS. Add one more property to your configuration:

props.put("mail.smtp.starttls.enable", "true");

这篇关于通过JavaMail发送到Gmail时的TLS问题的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！