c#发送邮件多种方法 c#异步发送邮件的实例代码

MailMessage m = new MailMessage
  ("item@jb200.com",
  "raja@jb200.com",
  "This is the subject for the authorized email.",
  "This is the body of the authorized mail!...");
// Send the message using authorization
SmtpClient client = new SmtpClient("smtp.jb200.com");
client.Credentials = new NetworkCredential("user", "password");
client.EnableSsl = true;
// Add the event handler
client.SendCompleted += new SendCompletedEventHandler(mail_SendCompleted);
// Send the message asynchronously
client.SendAsync(m, null);
// To Cancel the send
//client.SendAsyncCancel();
void mail_SendCompleted(object sender, AsyncCompletedEventArgs e)
{
  if (e.Cancelled)
    Console.WriteLine("Message cancelled");
  else if (e.Error != null)
    Console.WriteLine("Error: " + e.Error.ToString());
  else
    Console.WriteLine("Message sent");
}

public void sendmailLocalhost() 
{ 
System.Net.Mail.MailMessage msg = new System.Net.Mail.MailMessage(); 
msg.To.Add("a@a.com"); 
msg.To.Add("b@b.com"); 
/* msg.To.Add("b@b.com"); 
* msg.To.Add("b@b.com"); 
* msg.To.Add("b@b.com");可以发送给多人 
*/ 
msg.CC.Add(c@c.com); 
/* 
* msg.CC.Add("c@c.com"); 
* msg.CC.Add("c@c.com");可以抄送给多人 
*/ 
msg.From = new MailAddress("a@a.com", "AlphaWu", System.Text.Encoding.UTF8); 
/* 上面3个参数分别是发件人地址（可以随便写），发件人姓名，编码*/ 
msg.Subject = "这是测试邮件";//邮件标题 
msg.SubjectEncoding = System.Text.Encoding.UTF8;//邮件标题编码 
msg.Body = "邮件内容";//邮件内容 
msg.BodyEncoding = System.Text.Encoding.UTF8;//邮件内容编码 
msg.IsBodyHtml = false;//是否是HTML邮件 
msg.Priority = MailPriority.High;//邮件优先级
 
SmtpClient client = new SmtpClient(); 
client.Host = "localhost"; 
object userState = msg; 
try 
{ 
client.SendAsync(msg, userState); 
//简单一点儿可以client.Send(msg); 
MessageBox.Show("发送成功"); 
} 
catch (System.Net.Mail.SmtpException ex) 
{ 
MessageBox.Show(ex.Message, "发送邮件出错"); 
} 
}
    public void SendMailLocalhost() 
{ 
System.Net.Mail.MailMessage msg = new System.Net.Mail.MailMessage(); 
msg.To.Add("a@a.com"); 
msg.To.Add("b@b.com"); 
/* msg.To.Add("b@b.com"); 
* msg.To.Add("b@b.com"); 
* msg.To.Add("b@b.com");可以发送给多人 
*/ 
msg.CC.Add(c@c.com); 
/* 
* msg.CC.Add("c@c.com"); 
* msg.CC.Add("c@c.com");可以抄送给多人 
*/ 
msg.From = new MailAddress(master@boys90.com, "dulei", System.Text.Encoding.UTF8); 
/* 上面3个参数分别是发件人地址（可以随便写），发件人姓名，编码*/ 
msg.Subject = "这是测试邮件";//邮件标题 
msg.SubjectEncoding = System.Text.Encoding.UTF8;//邮件标题编码 
msg.Body = "邮件内容";//邮件内容 
msg.BodyEncoding = System.Text.Encoding.UTF8;//邮件内容编码 
msg.IsBodyHtml = false;//是否是HTML邮件 
msg.Priority = MailPriority.High;//邮件优先级
SmtpClient client = new SmtpClient(); 
client.Host = "localhost"; 
object userState = msg; 
try 
{ 
client.SendAsync(msg, userState); 
//简单一点儿可以client.Send(msg); 
MessageBox.Show("发送成功"); 
} 
catch (System.Net.Mail.SmtpException ex) 
{ 
MessageBox.Show(ex.Message, "发送邮件出错"); 
} 
}

public void SendMailUseZj()   
{   
System.Net.Mail.MailMessage msg = new System.Net.Mail.MailMessage();   
msg.To.Add(a@a.com);   
msg.To.Add(b@b.com);   
/*  
* msg.To.Add("b@b.com");  
* msg.To.Add("b@b.com");  
* msg.To.Add("b@b.com");可以发送给多人  
*/   
msg.CC.Add("c@c.com");   
/*  
* msg.CC.Add("c@c.com");  
* msg.CC.Add("c@c.com");可以抄送给多人  
*/   
msg.From = new MailAddress("master@boys90.com", "dulei", System.Text.Encoding.UTF8);   
/* 上面3个参数分别是发件人地址（可以随便写），发件人姓名，编码*/   
msg.Subject = "这是测试邮件";//邮件标题   
msg.SubjectEncoding = System.Text.Encoding.UTF8;//邮件标题编码   
msg.Body = "邮件内容";//邮件内容   
msg.BodyEncoding = System.Text.Encoding.UTF8;//邮件内容编码   
msg.IsBodyHtml = false;//是否是HTML邮件   
msg.Priority = MailPriority.High;//邮件优先级   
  
SmtpClient client = new SmtpClient();  
client.Credentials = new System.Net.NetworkCredential("admin@jb200.com", "userpass");   
//在71info.com注册的邮箱和密码   
client.Host = "smtp.71info.com";   
object userState = msg;   
try   
{   
client.SendAsync(msg, userState);   
//简单一点儿可以client.Send(msg);   
MessageBox.Show("发送成功");   
}   
catch (System.Net.Mail.SmtpException ex)   
{   
MessageBox.Show(ex.Message, "发送邮件出错");   
}   
}

public void SendMailUseGmail()   
{   
System.Net.Mail.MailMessage msg = new System.Net.Mail.MailMessage();   
msg.To.Add(a@a.com);   
msg.To.Add(b@b.com);   
/*  
 msg.To.Add("b@b.com");  
* msg.To.Add("b@b.com");  
* msg.To.Add("b@b.com");可以发送给多人  
*/   
msg.CC.Add(c@c.com);   
/*  
* msg.CC.Add("c@c.com");  
* msg.CC.Add("c@c.com");可以抄送给多人  
*/   
msg.From = new MailAddress("boys90.com", "dulei", System.Text.Encoding.UTF8);   
/* 上面3个参数分别是发件人地址（可以随便写），发件人姓名，编码*/   
msg.Subject = "这是测试邮件";//邮件标题   
msg.SubjectEncoding = System.Text.Encoding.UTF8;//邮件标题编码   
msg.Body = "邮件内容";//邮件内容   
msg.BodyEncoding = System.Text.Encoding.UTF8;//邮件内容编码   
msg.IsBodyHtml = false;//是否是HTML邮件   
msg.Priority = MailPriority.High;//邮件优先级   
SmtpClient client = new SmtpClient();   
client.Credentials = new System.Net.NetworkCredential("boys90com@gmail.com", "password");   
//上述写你的GMail邮箱和密码   
client.Port = 587;//Gmail使用的端口   
client.Host = "smtp.gmail.com";   
client.EnableSsl = true;//经过ssl加密   
object userState = msg;   
try   
{   
client.SendAsync(msg, userState);   
//简单一点儿可以client.Send(msg);   
MessageBox.Show("发送成功");   
}   
catch (System.Net.Mail.SmtpException ex)   
{   
MessageBox.Show(ex.Message, "发送邮件出错");   
}   
}