必须首先发出 STARTTLS 命令.使用 Java 和 Google Apps 发送电子邮件

问题描述

我正在尝试使用 使用 Google Apps 向 Lizard 的代码收费发送电子邮件.我收到此错误:

I am trying to use Bill the Lizard's code to send an email using Google Apps. I am getting this error:

Exception in thread "main" javax.mail.SendFailedException: Sending failed;
  nested exception is:
    javax.mail.MessagingException: 530 5.7.0 Must issue a STARTTLS command first. f3sm9277120nfh.74

    at javax.mail.Transport.send0(Transport.java:219)
    at javax.mail.Transport.send(Transport.java:81)
    at SendMailUsingAuthentication.postMail(SendMailUsingAuthentication.java:81)
    at SendMailUsingAuthentication.main(SendMailUsingAuthentication.java:44)

Bill 的代码包含下一行，似乎与错误有关:

Bill's code contains the next line, which seems related to the error:

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

然而，它没有帮助.

这些是我的导入语句:

import java.util.Properties;
import javax.mail.Authenticator;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

有人知道这个错误吗?

推荐答案

我发现了问题.以前我使用 j2ee.jar 导入 javax.mail.

I found the problem. Previously i was using j2ee.jar to import javax.mail.

我从类路径中删除了 j2ee.jar 并下载了 JavaMail 1.4.1 并放入我的类路径有两个 jar，smtp.jar 和 mailapi.jar.我现在用 smtps 而不是 smtp

I removed j2ee.jar from the classpath and downloaded JavaMail 1.4.1 and put into my classpath two jars, smtp.jar and mailapi.jar. I use now smtps instead smtp

Transport transport = session.getTransport("smtps");

现在比尔蜥蜴的代码有效.

Now Bill the Lizard's code works.

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