Java邮件异常错误；

Question

MyCode：

import java.util.Properties;
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;
public class SendMailTLS {
public static void main(String[] args) {
    final String username = "[e-mail]";
    final String password = "myemailpassword";
    Properties props = new Properties();
    props.put("mail.smtp.auth", "true");
    props.put("mail.smtp.starttls.enable", "true");
    props.put("mail.smtp.host", "smtp.gmail.com");
    props.put("mail.smtp.port", "587");
    Session session = Session.getInstance(props,
      new javax.mail.Authenticator() {
        protected PasswordAuthentication getPasswordAuthentication() {
            return new PasswordAuthentication(username, password);
        }
      });

    try {
        Message message = new MimeMessage(session);
        message.setFrom(new InternetAddress("[e-mail]"));
        message.setRecipients(Message.RecipientType.TO,
            InternetAddress.parse("[e-mail]"));
        message.setSubject("Testing Subject");
        message.setText("Dear Mail Crawler,"+
 "\n\n No spam to my email,please!"); 
        Transport.send(message);
        System.out.println("Done");
    } catch (MessagingException e) {
        throw new RuntimeException(e);
    }
}
}

我的错误：

线程“main”java.lang.RuntimeException：javax.mail.messagingException：
未知SMTP主机：SMTP.gmail.com；
嵌套异常为:
java.net.unknownHostException：SMTP.gmail.com
位于mail.sendmailtls.main(Sendmailtls.java:56)
原因：javax.mail.messagingException：未知SMTP主机：SMTP.gmail.com；
嵌套异常为:
java.net.unknownHostExceptionbr>在Java.net.sockssockettimpl.connect（socket.Java:366)
在Java.net.socket.connect（socket.Java:525)
在Java.net.socket.connect（socket.Java:475)
在com.sun.mail.util.socketfetcher.createSocket（socketfetcher.Java:319)
在com.sun.mail.util.socketfetcher.getsocket（

我的本地代理为172.17.0.4:8080，用户名为:user1，密码为:user2
请解决方案？？

Answer 1

如果您在代理下，我认为您不能使用Java Mail。

发件人：oracle.com

问：我如何配置JavaMail来通过我的代理服务器工作？