I check if the message has been read already. With imap the server knows which mails are read and which aren't. With pop3 all this info is in the client, so I think it is not possible to share this info between clients.

Ronald.


Op dinsdag, 2 juni 2009 11:21 schreef Phung Nam  :>
> Hi everybody!
>
> I have a trouble with "return receipt" problem in java. Anybody can help me
>
> I'm writing a web mail and when sending mail I have a option "Return
> Receipt" (I add "Disposition-Notification-To" header to email before I
> send). Other mail client (thunderbird) read it and confirm to send back a
> return receipt => It's okay
>
> My problems are :
>
> 1. When I get the message, how to know that message already return receipt
> before ? (because if that message haven't returned receipt I will confirm in
> my webmail to send return receipt).
>
> 2. How to send return receipt ? (The contend of receipt message) I see in
> rfc3462 and rfc3798 but I don't know how to do in javamail.
>
> These problem are very urgent for me. please help me ....
>
> Thanks a lots
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