事实证明,JavaMail 比我想象的更令人沮丧。我看过几个在线示例,了解如何通过 Gmail 的服务器(但不是通过 SSL)发送简单的 SMTP 电子邮件。在尝试了几个不同的代码示例之后,我在调用 transport.connect()
时一直得出相同的示例异常。我不断得到这个堆栈跟踪:
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)
有人可以告诉我应该添加什么或做些什么来解决这个问题吗?
这是我的代码:
Properties props = new Properties();
props.put("mail.transport.protocol", "smtp");
props.put("mail.host", "smtp.gmail.com");
props.put("mail.user", "blahblah@gmail.com");
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("blahblah2@gmail.com"));
transport.connect();
transport.sendMessage(message, message.getRecipients(Message.RecipientType.TO));
transport.close();
最佳答案
您需要启用 STARTTLS
。在您的配置中再添加一项属性:
props.put("mail.smtp.starttls.enable", "true");
关于java - 通过 JavaMail 发送到 gmail 时的 TLS 问题,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/6512430/