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我曾尝试实现一个使用 pop3 协议读取 Outlook 收件箱的简单程序，但即使有 2 封未读邮件，服务器也会返回零邮件。为什么会出现这个问题？它与 Microsoft Exchange 服务器设置有关吗？

public void retrieveEmail() {
        // JavaMail API - Exchange server to allow IMAP access

        // mail server connection parameters
        String user = "";
        String password = "";

        // connect to my pop3 inbox
        Properties properties = new Properties();

        properties.put("mail.store.protocol", "pop3");
        properties.put("mail.pop3.host", host);
        properties.put("mail.pop3.port", "110");
        properties.put("mail.pop3.user", user);
        properties.put("mail.pop3.timeout", "158000");
        properties.put("mail.pop3.connectiontimeout", "158000");

        Session session = Session.getInstance(properties);
        session.setDebug(true);

        Store store = null;
        Folder inbox = null;

        try {
            store = session.getStore("pop3");
            store.connect(host, user, password);
            inbox = store.getFolder("Inbox");
            inbox.open(Folder.READ_ONLY);

            // get the list of inbox messages
            int totalMsg = inbox.getMessageCount();
            int unread = inbox.getUnreadMessageCount();
            Message[] messages = inbox.getMessages();
            Message[] msg = inbox.search(new FlagTerm(new Flags(Flag.SEEN), false));

            System.out.print("size " + messages .length);
            if (messages.length == 0) System.out.println("No messages found.");

            for (int i = 0; i < messages.length; i++) {

                // stop after listing ten messages
                if (i > 10) {
                    System.exit(0);
                    inbox.close(true);
                    store.close();
                }

                System.out.println("Message " + (i + 1));
                System.out.println("From : " + messages[i].getFrom()[0]);
                System.out.println("Subject : " + messages[i].getSubject());
                Object content = messages[i].getContent();

                if (content instanceof String)  
                    System.out.print((String)content);  
                /* text/plain = String
                 * multipart" = Multipart
                 * MimeMessage
                 * input stream = Unknown Data Handler 
                 */

            }

            inbox.close(true);
            store.close();

        } catch (NoSuchProviderException e) {
            System.out.println(e.getMessage());
        } catch (MessagingException e) {
            System.out.println(e.getMessage());

        } catch (IOException e) {
            System.out.println(e.getMessage());
        } 
    }

编辑1：

我调试它并意识到文件夹中的变量总数为零

请帮忙。

谢谢。

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1 回答 1

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询问您的电子邮件管理员上述电子邮件帐户的“别名”的交换价值是多少。例如，如果他们将值设置为“香蕉！” 那么您必须将上面的代码更改为读取 store.getFolder("Bananas!") 而不是 store.getFolder("Inbox");

于 2012-11-12T04:27:41.297 回答