1 using System; 
 2 using System.Collections.Generic; 
 3 using System.Linq; 
 4 using System.Text; 
 5 using System.Net.Mail; 
 6 
 7 namespace IISSendMail 
 8 { 
 9     class Program 
10     { 
11         static void Main(string[] args) 
12         { 
13             /*第一种，利用Google的smtp来发送邮件*/ 
14             SmtpClient client = 
15                 new SmtpClient("smtp.gmail.com", 25); 
16             MailMessage msg = 
17                 new MailMessage("wengyuli@gmail.com","leonweng@qq.com","这个是标题","这个是内容"); 
18             client.UseDefaultCredentials = false; 
19             System.Net.NetworkCredential basicAuthenticationInfo = 
20                 new System.Net.NetworkCredential("username", "password"); 
21             client.Credentials = basicAuthenticationInfo; 
22             client.EnableSsl = true; 
23             client.Send(msg); 
24 
25             /*第二种，利用本地的smtp来发送邮件*/ 
26             SmtpClient smtp = 
27                 new SmtpClient("localhost", 25); 
28             MailMessage message = 
29                 new MailMessage("wengyuli@gmail.com", "leonweng@qq.com", "标题：测试一下iis发邮件", "内容：老翁，你好!哈哈"); 
30             smtp.Send(message); 
31 
32             Console.WriteLine("发送成功！"); 
33             Console.Read(); 
34         } 
35     } 
36 }
37