JavaMail如何通过sina企业邮箱进行发送邮件？ 通过sina的免费邮箱完全可以正常发送，不知道为什么，谁可以帮我下！万分感谢！

下面是我的代码:

smtpAuth.getuserinfo("email@mlee.com.cn", "******");

Properties props = System.getProperties();

props.put("mail.smtp.auth", "true");

props.put("mail.smtp.host", "smtp.sina.com.cn");

Session session = Session.getInstance(props, smtpAuth);

Message msg = new MimeMessage(session);

msg.setDataHandler(new DataHandler(body,"text/html; charset=gb2312"));

msg.setFrom(new InternetAddress("email@mlee.com.cn","yangqr"));

msg.setRecipients(Message.RecipientType.TO, InternetAddress.parse(to,

false));

Transport t = session.getTransport("smtp");

t.connect("smtp.sina.com.cn", "email@mlee.com.cn", "******");

msg.setSubject(MimeUtility.encodeText(subject, "gb2312", "b"));

msg.setSentDate(new Date());

msg.setContent(body, "text/html; charset=GBK");

Transport.send(msg);

以下是控制台输出的信息：

DEBUG: setDebug: JavaMail version 1.3.1

DEBUG: getProvider() returning javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Sun Microsystems, Inc]

DEBUG SMTP: useEhlo true, useAuth true

DEBUG SMTP: trying to connect to host "smtp.sina.com.cn", port 25

220 mail5-203.sinamail.sina.com.cn ESMTP

DEBUG SMTP: connected to host "smtp.sina.com.cn", port: 25

EHLO yangqing-132788

250-mail5-203.sinamail.sina.com.cn

250-8BITMIME

250-SIZE 31457280

250-AUTH PLAIN LOGIN

250 AUTH=PLAIN LOGIN

DEBUG SMTP: Found extension "8BITMIME", arg ""

DEBUG SMTP: Found extension "SIZE", arg "31457280"

DEBUG SMTP: Found extension "AUTH", arg "PLAIN LOGIN"

DEBUG SMTP: Found extension "AUTH=PLAIN", arg "LOGIN"

DEBUG SMTP: Attempt to authenticate

AUTH LOGIN

334 VXNlcm5hbWU6

ZW1haWxAbWxlZS5jb20uY24=

334 UGFzc3dvcmQ6

MTIzNDU2

535 #5.7.0 Authentication failed

DEBUG SMTP: useEhlo true, useAuth true

DEBUG SMTP: trying to connect to host "smtp.sina.com.cn", port 25

220 mail5-201.sinamail.sina.com.cn ESMTP

DEBUG SMTP: connected to host "smtp.sina.com.cn", port: 25

EHLO yangqing-132788

250-mail5-201.sinamail.sina.com.cn

250-8BITMIME

250-SIZE 31457280

250-AUTH PLAIN LOGIN

250 AUTH=PLAIN LOGIN

DEBUG SMTP: Found extension "8BITMIME", arg ""

DEBUG SMTP: Found extension "SIZE", arg "31457280"

DEBUG SMTP: Found extension "AUTH", arg "PLAIN LOGIN"

DEBUG SMTP: Found extension "AUTH=PLAIN", arg "LOGIN"

DEBUG SMTP: Attempt to authenticate

AUTH LOGIN

334 VXNlcm5hbWU6

ZW1haWxAbWxlZS5jb20uY24=

334 UGFzc3dvcmQ6

MTIzNDU2

535 #5.7.0 Authentication failed