System.Net.Mail.SmtpException: 事务失败。 服务器响应为: <unknown[203.86.72.147]>: Client host rejected: Access denied
System.Net.Mail.SmtpException: 事务失败。 服务器响应为: <unknown[203.86.72.147]>: Client host rejected: Access denied
写了一个邮件程序　报了上个错误,请高手看看

[解决办法]
203.86.72.147是哪个IP？