evolution 不能发送邮件？

pupilzeng

sending : EHLO allhosts
received: 250-sjtu.edu.cn
received: 250-PIPELINING
received: 250-SIZE 6000000
received: 250-VRFY
received: 250-ETRN
received: 250-AUTH LOGIN PLAIN
received: 250 8BITMIME
This server supports 8bit MIME
sending : MAIL FROM:<somebody@sjtu.edu.cn>
received: 250 Ok
sending : RCPT TO:<somebody@163.com>
received: 554 <somebody@163.com>: Recipient address rejected: Relay access denied
sending : QUIT
received: 221 Bye

这是我用somebody@sjtu.edu.cn发送给somebody@163.com出现的情况。
evolution 1.4.5