Salut,
en regardant sur le site de sun je suis tombé sur ça :
Q: Can I use JavaMail to read mail from my web mail account
(such as Yahoo or Hotmail)?
A: It depends. Many web-based email services provide access only
using a browser with HTTP. These services cannot be accessed using JavaMail.
If the service also provides POP3 or IMAP access, JavaMail can probably
be used to access it.
Contact your web email service provider for details.
Also, see the JHTTPMail project
for an open source provider for JavaMail that provides access to Hotmail.
Another helpful tool is MrPostman, a proxy server that provides POP3 access
to Hotmail and Yahoo! Mail, available at 
[ Lien ]
Je trouve le dernier lien plus interessant .
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"On n'est pas au resto : ici on ne fait pas dans les plats tout cuits ..."
WORA