C＃發送電子郵件問題

Question

我想用C＃發送一封電子郵件，而且我遇到了一些問題。每當我嘗試發送電子郵件時，都會收到一條消息「錯誤：無法發送郵件」。 這裏是我的代碼：

try 
     { 
      client.Host = "smtp.gmail.com"; 
      client.Port = 465; 
      client.UseDefaultCredentials = false; 
      client.Credentials = smtpCreds; 
      client.EnableSsl = true; 

      MailAddress sendFrom = new MailAddress("from@domain.com"); 
      MailAddress sendTo = new MailAddress("to@domain.com"); 
      MailMessage msg = new MailMessage(sendFrom,sendTo); 
      msg.Subject = "Subject"; 
      msg.Body = "Body"; 
      client.Send(msg); 
     } 
     catch (Exception e) 
     { 
      MessageBox.Show("Error:" + e.Message); 
     } 

我也有這樣的聲明：

public SmtpClient client = new SmtpClient(); 
    public System.Net.NetworkCredential smtpCreds = new System.Net.NetworkCredential("mail", "password"); 

希望你能幫助我。

Answer 1

你可以試試這個，並確保使用有效的登錄證書，你有互聯網連接：

MailMessage mail = new MailMessage(); 
mail.Subject = "Your Subject"; 
mail.From = new MailAddress("senderMailAddress"); 
mail.To.Add("ReceiverMailAddress"); 
mail.Body = "Hello! your mail content goes here..."; 
mail.IsBodyHtml = true; 

SmtpClient smtp = new SmtpClient("smtp.gmail.com", 587); 
smtp.EnableSsl = true; 
NetworkCredential netCre = new NetworkCredential("SenderMailAddress","SenderPassword"); 
smtp.Credentials = netCre; 

try 
    { 
    smtp.Send(mail);     
    } 
    catch (Exception ex) 
    {    
    } 

Answer 2

試試這個代碼

 using System.Net.Mail; 

     MailMessage mail = new MailMessage(); 
     SmtpClient SmtpServer = new SmtpClient("smtp.gmail.com"); 
     mail.From = new MailAddress("sender@gmail.com"); 
     mail.To.Add("reciever@gmail.com"); 
     mail.Subject = ("e mail subject"); 
     mail.Body = ("message body"); 
     SmtpServer.Port = 587; 
     SmtpServer.Credentials = new System.Net.NetworkCredential("sender's username",   "sender's password"); 
     SmtpServer.EnableSsl = true; 
     SmtpServer.Send(mail); 
     MessageBox.Show("mail Send");