mail not sent on other addresses other than exchange server

[Anil Prasad]

Hi All,

I want send mail through my exchange server.Problem is that whenever I give mail address other than my exchange server.My code generates exception

[2007-02-20 12:17:12.843 IST] (error) The mail has not been sent due to: (javax.mail.SendFailedException: Invalid Addresses;
nested exception is:
javax.mail.SendFailedException: 550 5.7.1 Unable to relay for [e-mail]
, )

Can any body help me out.Thanks in advance.

[Ulf Dittmer]

Most email servers are configured to only send emails for accounts hosted on that server. It's a spam protection measure.