Java Requires Chilkat v11.0.0+

How to Download Messages in MessageSet One at a Time

See more IMAP Examples

If a message set contains a huge number of emails, it's NOT a good idea to try to download all at once into an email bundle using a method such as FetchBundle. It's better to iterate over the messages in the set to download one by one. Chilkat2 Java

import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.Email;
import com.chilkatsoft.chilkat2.Imap;
import com.chilkatsoft.chilkat2.MessageSet;

public class ChilkatExample {

    public static void main(String[] args) {
        // This example requires the Chilkat API to have been previously unlocked.
        // See Global Unlock Sample for sample code.

        Imap imap = new Imap();

        // Connect using TLS.
        imap.setSsl(true);
        imap.setPort(993);
        try {
            imap.connect("imap.example.com");

            // Authenticate
            imap.login("email_account_login", "email_account_password");

            // Select an IMAP mailbox
            imap.selectMailbox("Inbox");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // Search for messages and return a set of matching messages.
        // (This example will simply search for ALL messages.)
        boolean fetchUids = true;

        MessageSet messageSet = new MessageSet();
        try {
            imap.queryMbx("ALL", fetchUids, messageSet);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        System.out.println("Number of messages = " + messageSet.getCount());

        Email email = new Email();
        int i = 0;
        while (i < messageSet.getCount()) {
            try {
                imap.fetchEmail(false, messageSet.getId(i), fetchUids, email);
            } catch (ChilkatException e) {
                System.out.println(e.getLastErrorText());
                return;
            }

            System.out.println(email.getFrom() + "; " + email.getSubject());

            i = i + 1;
        }

        System.out.println("OK");
    }
}