Java Mail Api, delete mails from gmail - jakarta-mail

Question

For testing reasons, I want an email account to be empty every day, I have this code but isn't deleting the emails.
public class EmailService {
private String HOST = "imap.gmail.com";
private String USERNAME = "mail#gmail.com";
private String PASSWORD = "pass";
private Properties properties;
private Store store;
private Folder inbox;
public EmailService() throws MessagingException {
this.properties = new Properties();
this.properties.put("mail.imap.host", HOST);
this.properties.put("mail.imap.port", "993");
this.properties.put("mail.imap.starttls.enable", "true");
}
public void openEmailSession() throws MessagingException, InterruptedException {
Session emailSession = Session.getInstance(this.properties);
emailSession.setDebug(true);
this.store = emailSession.getStore("imaps");
this.store.connect(HOST, USERNAME, PASSWORD);
this.inbox = this.store.getFolder("INBOX");
this.inbox.open(Folder.READ_WRITE);
}
public void closeEmailSession() throws MessagingException, IOException {
this.inbox.close(true);
this.store.close();
}
public Message[] getUserMessages() throws MessagingException, IOException {
Message[] messages = this.inbox.getMessages();
return messages;
}
public void cleanInbox() throws IOException, MessagingException {
Message[] messages = this.getUserMessages();
for (Message message :messages) {
message.setFlag(Flags.Flag.DELETED, true);
}
}
}
When I execute:
emailService.openEmailSession();
emailService.cleanInbox();
emailService.closeEmailSession();
The emails disappear from inbox, but then I click on All Mail and the emails still there and the trash is empty. I don't understand what is happening.
On the gmail settings in "Forwarding and POP/IMAP" I already tried autoexpunge on/off and the three options in "When a message is marked as deleted and expunged from the last visible IMAP folder"
But nothing changes... What I'm missing?
Edit: Debug output for [Gmail]/All mail
DEBUG: setDebug: JavaMail version 1.5.6
DEBUG: getProvider() returning javax.mail.Provider[STORE,imaps,com.sun.mail.imap.IMAPSSLStore,Oracle]
DEBUG IMAPS: mail.imap.fetchsize: 16384
DEBUG IMAPS: mail.imap.ignorebodystructuresize: false
DEBUG IMAPS: mail.imap.statuscachetimeout: 1000
DEBUG IMAPS: mail.imap.appendbuffersize: -1
DEBUG IMAPS: mail.imap.minidletime: 10
DEBUG IMAPS: trying to connect to host "imap.gmail.com", port 993, isSSL true
* OK Gimap ready for requests from 46.25.184.193 f20mb151859057edc
A0 CAPABILITY
* CAPABILITY IMAP4rev1 UNSELECT IDLE NAMESPACE QUOTA ID XLIST CHILDREN X-GM-EXT-1 XYZZY SASL-IR AUTH=XOAUTH2 AUTH=PLAIN AUTH=PLAIN-CLIENTTOKEN AUTH=OAUTHBEARER AUTH=XOAUTH
A0 OK Thats all she wrote! f20mb151859057edc
DEBUG IMAPS: AUTH: XOAUTH2
DEBUG IMAPS: AUTH: PLAIN
DEBUG IMAPS: AUTH: PLAIN-CLIENTTOKEN
DEBUG IMAPS: AUTH: OAUTHBEARER
DEBUG IMAPS: AUTH: XOAUTH
DEBUG IMAPS: protocolConnect login, host=imap.gmail.com, user=mail#gmail.com, password=<non-null>
DEBUG IMAPS: AUTHENTICATE PLAIN command trace suppressed
DEBUG IMAPS: AUTHENTICATE PLAIN command result: A1 OK mail#gmail.com authenticated (Success)
A2 CAPABILITY
* CAPABILITY IMAP4rev1 UNSELECT IDLE NAMESPACE QUOTA ID XLIST CHILDREN X-GM-EXT-1 UIDPLUS COMPRESS=DEFLATE ENABLE MOVE CONDSTORE ESEARCH UTF8=ACCEPT LIST-EXTENDED LIST-STATUS LITERAL- APPENDLIMIT=35651584
A2 OK Success
DEBUG IMAPS: connection available -- size: 1
A3 SELECT "[Gmail]/All Mail"
* FLAGS (\Answered \Flagged \Draft \Deleted \Seen $NotPhishing $Phishing)
* OK [PERMANENTFLAGS (\Answered \Flagged \Draft \Deleted \Seen $NotPhishing $Phishing \*)] Flags permitted.
* OK [UIDVALIDITY 11] UIDs valid.
* 10 EXISTS
* 0 RECENT
* OK [UIDNEXT 3903] Predicted next UID.
* OK [HIGHESTMODSEQ 101809]
A3 OK [READ-WRITE] [Gmail]/All Mail selected. (Success)
A4 STORE 1 +FLAGS (\Deleted)
* 1 FETCH (FLAGS (\Seen \Deleted))
A4 OK Success
A5 STORE 2 +FLAGS (\Deleted)
* 2 FETCH (FLAGS (\Deleted))
A5 OK Success
A6 STORE 3 +FLAGS (\Deleted)
* 3 FETCH (FLAGS (\Seen \Deleted))
A6 OK Success
A13 OK Success
A14 CLOSE
A14 OK Returned to authenticated state. (Success)
DEBUG IMAPS: added an Authenticated connection -- size: 1
A15 LOGOUT
* BYE LOGOUT Requested
A15 OK 73 good day (Success)
DEBUG IMAPS: IMAPStore connection dead
DEBUG IMAPS: IMAPStore cleanup, force false
DEBUG IMAPS: IMAPStore cleanup done

Answer 1

You have to first copy the message to the folder [Gmail]/Trash, which will cause it to be immediately expunged from the current folder. Then you have to open [Gmail]/Trash and delete the message. That will make the message go away for good.
I added this information to the JavaMail FAQ.

Answer 2

I found an alternative solution, is not the best for my purpose (jenkins integration) but it works for now.
Is a really simple function in google script, you can select your email and schedule the function as you want.
https://www.google.com/script/start/
function cleanInbox() {
var threads = GmailApp.search('label:inbox');
for (var i = 0; i < threads.length; i++) {
threads[i].moveToTrash();
}
}