Retrieving all unread emails using javamail with POP3 protocol

Question

I am trying to access my gmail account and retrieve the information of all unread emails from that.

I have written my code after referring many links. I am giving a

Answer 1

Your code should work. You can also use the Folder.getUnreadMessageCount() method if all you want is the count.

JavaMail can only tell you what Gmail tells it. Perhaps Gmail thinks that all those messages have been read? Perhaps the Gmail web interface is marking those messages read? Perhaps you have another application monitoring the folder for new messages?

Try reading an unread message with JavaMail and see if the count changes.

You might find it useful to turn on session debugging so you can see the actual IMAP responses that Gmail is returning; see the JavaMail FAQ.

Answer 2

The correct flag to use is

Flags.Flag.RECENT

Answer 3

You cannot fetch unread messages with POP3. From JavaMail API:

POP3 supports no permanent flags (see Folder.getPermanentFlags()). In particular, the Flags.Flag.RECENT flag will never be set for POP3 messages. It's up to the application to determine which messages in a POP3 mailbox are "new".

You can use IMAP protocol and use the SEEN flag like this:

public Message[] fetchMessages(String host, String user, String password, boolean read) {
    Properties properties = new Properties();
    properties.put("mail.store.protocol", "imaps");

    Session emailSession = Session.getDefaultInstance(properties);
    Store store = emailSession.getStore();
    store.connect(host, user, password);

    Folder emailFolder = store.getFolder("INBOX");
    // use READ_ONLY if you don't wish the messages
    // to be marked as read after retrieving its content
    emailFolder.open(Folder.READ_WRITE);

    // search for all "unseen" messages
    Flags seen = new Flags(Flags.Flag.SEEN);
    FlagTerm unseenFlagTerm = new FlagTerm(seen, read);
    return emailFolder.search(unseenFlagTerm);
}

Another thing to notice is that POP3 doesn't handle folders. IMAP gets folders, POP3 only gets the Inbox. More info at: How to retrieve gmail sub-folders/labels using POP3?

Answer 4

Change inbox.open(Folder.READ_ONLY); to inbox.open(Folder.READ_WRITE); It will change your mail as read in inbox.

Answer 5

Flags seen = new Flags(Flags.Flag.RECENT);
FlagTerm unseenFlagTerm = new FlagTerm(seen, false);
messages = inbox.search(unseenFlagTerm);

Answer 6

please use this method to get the unread mails

getNewMessageCount()

refer below link:

https://javamail.java.net/nonav/docs/api/com/sun/mail/imap/IMAPFolder.html