A doubt about mailing concept

Hi i just ended up completing mail servlet from where i can send mail through a SMTP and recieve at
my POP account.Attachments too can be included/downloaded in both cases.
1>
The problem is that when i login to pop account and see the messages after it is retrieved
, i get only new messages and not the ones which have been viewed already as we do in
Outlook express.When i see them through outlook express first and then go to inbox from my servlet,those messages are not there and i get Empty.
2>Every time retrieval process starts to show same messages again.
How to handle this ?.I find illustration of codes in java-mail working in same way .

If this is the limitation of Javamail as i have not
seen a single code either in demo or anywhere then i
would say it is good for nothingIt's not a limitation of Java. You need to understand the POP protocol. I don't think there's a way with POP to read a message and leave it on the server. As far as I know, once you read a message, it comes off the server. You need to manage its storage after that. The IMAP protocol allows you to read a message but leave it on the server. Read up on these protocols, and to through the [url http://java.sun.com/developer/onlineTraining/JavaMail/]JavaMail tutorial

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