Problem deleting e-mail (folder return newest messages first, older last)

I made a program, using javamail, to accomplish a quite sofisticated mail forward.
I read a specific mailbox, I read each message in the INBOX, and in some conditions (I read the content, get a predefined field containing a product ID, read a database and check if the price is high) I forward the e-mail.
Then I delete the forwarded email from the inbox.<br>
I am using pop3 & smtp, and I have First Class from Centrinity as Mail Server.
The problem I have is the following:
1) in the messages array filled with Message[] messages = folder.getMessages() I get the newest messages first, the older last.
2) I scan the array, and, based on the Item price (as explained before) I delete some messages: messages(i).setFlag(Flags.Flag.DELETED,true)
3) messages are phisically deleted only when the folder INBOX is closed: folder.close(true)
4) if new messages arrives before closing the INBOX, THE WRONG MESSAGES ARE DELETED!.
Example:
- I have 3 messages in the inbox;
- the program start;
- I process the message number 1, I forward it, I delete it;
- I process the message number 2, no forward, no delete;
- (a new message "NEW" arrive now);
- I process the message number 3, no forward, no delete;
- I close the folder
- THE NEW MESSAGE IS DELETED!!!!!!
I am sure this is because of the ordering of the messages, but I cannot figure out a safe deletion while new messages arrives (and I cannot think I can't solve this problem: no pop3 client should exists!!)
Thanks in advance for the help
Paolo Rossetto

Please take a look at : http://java.sun.com/developer/onlineTraining/JavaMail/contents.html
and you will find the answer

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I have mistakenly deleted a mail folder which I had created. Can't remember if it was located to 'iCloud' or 'On My Mac'. How can I retrieve the emails contained in this deleted folder? Your help will be immensely appreciated!

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Hi Macmonter,
i have seen the complete post here and realised that your answer should have been selected as most useful, unfortunately Charlie7 didn't tried it and hence it was ignored. I still appreciate your experiemnt.
I am pretty new to this community thing, but i did a lot of experiments with Mail application and hence i m writing this post specifically which might be helpful to others. I use Yahoo Mail (only) for all online services like Facebook, G+, LinkedIn, Twitter etc. all possible. It's my central ID now and i cant change it any more. Going online and checking yahoo mail is sometimes very resource taking hence i decided to use mail client like Mail.app. Let me tell you that i personally tried all other mail apps including thunderbird but noticed one very imp thing that when u use Mail.app then your mails 7 their attachments are automatically indexed by Mac OS which is very important feature and when you search something then it searches within your mail also, this is really awesome. This will not happen if u use thunderbird or any other mail client. Also you get to use free Cloud with auto sync. Now this also tells you that I am stuck with 2 (idiotic) giants : Yahoo & Mac OSX Mail.
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Thanks a lot for this. The calculation you provided fixes the issue. However, The partition part of it seems to cause another.
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Image: !http://www.aerographicsuk.com/Invalid%20Identifier.jpg!
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Kranthi, I can only paste in the Oracle SQL, which isn't real SQL. There are lots of other calcs though, so they'll probably be a lot there. Please let me know if you'd like to see it.
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