SMTP and MS Exchange Server

[Ashley Stewart <ashrstewart@yahoo.com>]

Hello,

I am using javax.mail to send an email to a user on a
Microsoft Exchange Server.  The SMTP address for the
user is the same as their email address.  When I use
this as the host address, I get the following error:

java.net.UnknownHostException:  [SMTP address here]

Do I need to authenticate with the server by using: 
javax.mail.Transport.connect(host, user, password); ??

Thanks,
ashley

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