用C#发邮件的问题

Question

using System;
using System.Collections.Generic;
using System.Text;
using System.Net.Mail;namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            try
            {
                MailAddress to = new MailAddress("[email protected]");
                MailAddress from = new MailAddress("[email protected]");
                MailMessage message = new MailMessage(from, to);
                message.Subject = "Using the new SMTP client.";
                message.Body = @"Using this new feature, you can send an e-mail message from an application very easily.";
                // Use the application or machine configuration to get the 
                // host, port, and credentials.
                SmtpClient client = new SmtpClient("smtp.163.com",25);
                Console.WriteLine("Sending an e-mail message to {0} at {1} by using the SMTP host {2}.",
                    to.User, to.Host, client.Host);
                client.Send(message);
                Console.WriteLine("OK");
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message+ex.Data);
            }
        }
    }
}
错误:
不允许使用邮箱名称。 服务器响应为: sorry, that domain isn't in my list of allowe
d rcpthosts (#5.7.1)
这是怎么回事啊.................................................

Answer 1

参考调用Gmail的例子，
http://www.codeproject.com/useritems/SendMailUsingGmailAccount.asp