JavaMail 1.4.3 通过 Exchange 2003 发送邮件

Question

我不断收到 550 5.7.1 无法中继 [电子邮件受保护]

尝试{ 属性 p = System.getProperties();

        p.put("mail.smtp.host", "server IP");
        p.put("mail.smtp.port", "25");
        p.put("mail.debug", "true");
        Session s = Session.getDefaultInstance(p);

        Message msg = new MimeMessage(s);

        msg.setFrom(new InternetAddress(from));

        msg.setRecipient(Message.RecipientType.TO, new InternetAddress(to));

        msg.setSubject(subject);

        Multipart mp = new MimeMultipart();

        BodyPart bp = new MimeBodyPart();
        bp.setText(message);

        mp.addBodyPart(bp);

        msg.setContent(mp);

        Transport t = s.getTransport("smtp");
        t.send(msg);
        return 0;
    } catch (Exception e) {
        e.printStackTrace();
        return 1;
    }

Answer 1

您必须先登录您的 Exchange smtp。

String host = "smtp.gmail.com;
String username = "user";
String password = "passwd";
Properties props = new Properties();
props.put("mail.smtps.auth", "true");
// ...
MimeMessage msg = new MimeMessage(session);
// set the message content here
Transport t = session.getTransport("smtps");
try {
t.connect(host, username, password);
t.sendMessage(msg, msg.getAllRecipients());
} finally {
t.close();
}

或

更改您的交换设置以允许您无需登录即可发送

允许应用程序服务器进行中继
关闭 Exchange Server 2007
http://msexchangeteam.com/archive/2006/12/28/432013.aspx

Answer 2

您的交换服务器可能不允许中继您提交给它的 IP？或者在中继之前可能需要身份验证。