如何操作 POP3 消息？

Question

使用的邮件存储是 POP3 :

mail.storeType=pop3s
mail.host=pop.moov.mg
mail.port=995
mail.username=somemail
mail.password=somepassword
mail.auth=true
mail.ssl.trust=*

我想检索电子邮件，然后标记它们，但我不能标记它们:

public POP3Store getEmailStore() throws Exception {
    Properties properties = new Properties();
    properties.setProperty("mail.store.protocol", storeType);
    properties.setProperty("mail." + storeType + ".host", host);
    properties.setProperty("mail." + storeType + ".port", String.valueOf(port));
    properties.setProperty("mail." + storeType + ".auth", String.valueOf(auth));
    properties.setProperty("mail." + storeType + ".socketFactory.class", "javax.net.ssl.SSLSocketFactory");
    properties.setProperty("mail." + storeType + ".ssl.trust", sss_trust);
    try {
         Session emailSession = Session.getDefaultInstance(properties);
         POP3Store emailStore = (POP3Store) emailSession.getStore(storeType);
         return emailStore;
    } catch (NoSuchProviderException e) {
         e.printStackTrace();
         throw e;
    }
}

private POP3Store emailstore = null;
emailstore = getEmailStore();
Folder emailFolder = emailstore.getFolder("INBOX");
emailFolder.open(Folder.READ_WRITE);
Message[] messages = emailFolder.getMessages();
if (messages != null) {
  for (Message message : messages) {
    if (message.getHeader("eeeee") == null || !Arrays.asList(message.getHeader("eeeee")).contains("ticket created")) {
      try {
         mailService.createTicket(message);
         mailService.mark(message);
      } catch (Exception ex) {
         throw ex;
      }
    }
  }
}
System.out.println("FIN Receving");
emailFolder.close(true);

mailService.mark 代码：

public void mark(Message message) throws MessagingException {
        try {
            message.setHeader("eeeee", "ticket created");
        } catch (Exception e) {
            e.printStackTrace();
            throw e;
        }
    }

在运行时我得到 IllegalWriteException POP3 messages are read-only

那么如何操作消息呢？

Answer 1

POP3 是用于检索消息的旧协议。它旨在用于下载邮件，其理念是检索到的邮件会立即从服务器中删除，类似于物理邮箱的工作方式。

它根本不提供处理消息的机制。

如何操作 POP3 消息？

How to manipulate a POP3 message?

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