Earlier I was getting NoSuchProvider Exception. I uploaded complete META-INF folder to my site.
Now I am Getting This when trying with recipient as xxx@usa.net.

javax.mail.SendFailedException: Sending failed; nested exception is: javax.mail.SendFailedException: Invalid Addresses; nested exception is: javax.mail.SendFailedException: 553 sorry, that domain isn't in my list of allowed rcpthosts (#5.7.1)