99.9%邮件发送失败

类型 用户名 时间 内容
SMTP cytre0234
60.16.136.92|60.16.136.92 09-1-11 17:25 (smtp.sina.com:25) END - 500 #5.5.1 command not recognized  
SMTP cytre0234
60.16.136.92|60.16.136.92 09-1-11 17:25 (smtp.sina.com:25) DATA - 530 Authentication required  
SMTP cytre0234
60.16.136.92|60.16.136.92 09-1-11 17:25 (smtp.sina.com:25) RCPT TO - 530 Authentication required  
SMTP cytre0234
60.16.136.92|60.16.136.92 09-1-11 17:25 (smtp.sina.com:25) MAIL FROM - 530 Authentication required  
SMTP cytre0234
60.16.136.92|60.16.136.92 09-1-11 17:25 (smtp.sina.com:25) PASSWORD - 454 #4.5.4 Temporary authentication failure  
SMTP cytre0233
60.16.136.92|60.16.136.92 09-1-11 13:09 (smtp.sina.com:25) END - 500 #5.5.1 command not recognized  
SMTP cytre0233
60.16.136.92|60.16.136.92 09-1-11 13:09 (smtp.sina.com:25) DATA - 530 Authentication required  
SMTP cytre0233
60.16.136.92|60.16.136.92 09-1-11 13:09 (smtp.sina.com:25) RCPT TO - 530 Authentication required  
SMTP cytre0233
60.16.136.92|60.16.136.92 09-1-11 13:09 (smtp.sina.com:25) MAIL FROM - 530 Authentication required  
SMTP cytre0233
60.16.136.92|60.16.136.92 09-1-11 13:09 (smtp.sina.com:25) PASSWORD - 535 #5.7.0 Authentication failed  
SMTP admin
220.189.214.140|220.189.214.140 09-1-11 10:47 (smtp.sina.com:25) END - 500 #5.5.1 command not recognized  
SMTP admin
220.189.214.140|220.189.214.140 09-1-11 10:47 (smtp.sina.com:25) DATA - 530 Authentication required  
SMTP admin
220.189.214.140|220.189.214.140 09-1-11 10:47 (smtp.sina.com:25) RCPT TO - 530 Authentication required  
SMTP admin
220.189.214.140|220.189.214.140 09-1-11 10:47 (smtp.sina.com:25) MAIL FROM - 530 Authentication required  
SMTP admin
220.189.214.140|220.189.214.140 09-1-11 10:47 (smtp.sina.com:25) PASSWORD - 535 #5.7.0 Authentication failed  
SMTP admin
220.189.214.140|220.189.214.140 09-1-11 10:47 (smtp.sina.com:25) END - 500 #5.5.1 command not recognized  
SMTP admin
220.189.214.140|220.189.214.140 09-1-11 10:47 (smtp.sina.com:25) DATA - 530 Authentication required


但是有几次发送是成功的，99.9%被拒，也没有最终的解决方案啊？

郁闷啊，我就从来没有发成功过。

http://faq.comsenz.com/viewnews-546
可以对照这里查看一下你发送失败都是哪些原因