javaでメール送信すると下記のエラーメッセージが出ます。
どうすればよいのでしょうか？

Caused by: javax.mail.SendFailedException: Sending failed;
nested exception is:
javax.mail.SendFailedException: Invalid Addresses;
nested exception is:
javax.mail.SendFailedException: 550 5.7.1 <[email protected]>... Relaying denied. IP name lookup failed [xxxx.xxxx.xxxx.xxxx]

at javax.mail.Transport.send0(Transport.java:219)