JavaMail - 多个发件人

Question

我有一个简单的javamail类来通过SMTP发送电子邮件。只要我只从一个地址发送电子邮件，它就可以工作。如果我尝试使用其他地址，它会出于某种原因引发此异常：

com.sun.mail.smtp.SMTPSendFailedException: 550 5.1.0 Use your own address, please.

这是我的班级：

    public class EmailSender {

        private static final String HOST = "xxxx.xxxxxx.xx";
        private static final String PORT = "xx";

        public static boolean sendMail(String from, String to, String pass, String subject, String text){

               Properties properties = new Properties();

               properties.setProperty("mail.smtp.host", HOST);
               properties.setProperty("mail.smtp.port", PORT);
               properties.setProperty("mail.smtp.auth", "true");
               properties.setProperty("mail.user", from);
               properties.setProperty("mail.password", pass);

               Session session = Session.getDefaultInstance(properties, new CustomAuthenticator(from, pass));

               try {
                   MimeMessage message = new MimeMessage(session);
                   message.setFrom(new InternetAddress(from));
                   message.addRecipient(Message.RecipientType.TO, new InternetAddress(to));
                   message.setSubject(subject);
                   message.setText(text);

                   Transport.send(message);

                   return true;
               }catch (MessagingException e) {
                   e.printStackTrace();
                   return false;
               }
        }
    }

如果您想知道，CustomAuthenticator类看起来像这样：

    public class CustomAuthenticator extends Authenticator{
        private String user;
        private String pw;
        public CustomAuthenticator (String username, String password){
           super();
           this.user = username;
           this.pw = password;
        }
       public PasswordAuthentication getPasswordAuthentication(){
          return new PasswordAuthentication(user, pw);
       }
    }

Answer 1

您的服务器不会让您使用不属于您的地址。根据您的服务器，可能有一种方法可以说服其他地址也是您的。通常＆＃34;你的＆＃34;表示＆＃34;与您登录时使用的帐户关联的地址＆＃34;。

Answer 2

所以我发现解决方案是使用SMTPTransport类。

    public class EmailSender {

        private static final String HOST = "xxxx.xxxxxx.xx";
        private static final String PORT = "xx";

        public static boolean sendMail(String from, String to, String pass, String subject, String text){

               Properties properties = new Properties();

               properties.setProperty("mail.smtp.port", PORT);
               properties.setProperty("mail.smtp.auth", "true");

               Session session = Session.getDefaultInstance(properties, new CustomAuthenticator(from, pass));

               try {
                   MimeMessage message = new MimeMessage(session);
                   message.setFrom(new InternetAddress(from));
                   message.addRecipient(Message.RecipientType.TO, new InternetAddress(to));
                   message.setSubject(subject);
                   message.setText(text);

                   SMTPTransport tp = (SMTPTransport)session.getTransport();
                   tp.connect(HOST, from, pass);
                   tp.sendMessage(message, message.getAllRecipients());
                   tp.close();

                   return true;
               }catch (MessagingException e) {
                   e.printStackTrace();
                   return false;
               }
        }
    }