SmtpException在发送电子邮件 [英] SmtpException while sending Email

问题描述

我想通过我的C＃代码发送电子邮件，但我得到 SmtpException

一个连接尝试失败，因为连接的方没有正确一段时间后响应或已建立的连接失败，因为连接主机未能响应173.194.67.109:587

这里是我如何发送电子邮件：

 字符串HostAddress =smtp.gmail。 COM; 
味精MAILMESSAGE新= MAILMESSAGE（）; 
 msg.From =新的MailAddress（fromEmail）; 
 msg.Subject =测试邮件; 
 msg.Body =嗨测试发票; 
 msg.IsBodyHtml = TRUE; 
 msg.To.Add（新MailAddress（[e-mail]））; 
 SmtpClient客户端=新SmtpClient（）; 
 client.Host = HostAddress; 
 client.EnableSsl = TRUE; 
的NetworkCredential =空间日志相册新的NetworkCredential（）; 
 creadit.UserName = msg.From.Address; 
 creadit.Password =密码; 
 client.UseDefaultCredentials = TRUE; 
 client.Credentials =空间日志相册; 
 client.Port = 587; 
 client.Send（MSG）; 
  

解决方案

您的问题就在这里：

  client.UseDefaultCredentials = TRUE; 
 client.Credentials =空间日志相册; 
  

您指定的一组凭据，但你的也的告诉 SmtpClient 使用默认凭据（即登录用户的Windows用户名和密码）。设置 UseDefaultCredentials 设置为false，它会使用你提供的凭据来代替。

I am trying to send Email through my C# code but I am getting SmtpException

A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond 173.194.67.109:587

Here is how I am sending Email:

string HostAddress = "smtp.gmail.com";
MailMessage msg = new MailMessage();
msg.From = new MailAddress(fromEmail);
msg.Subject = "Test Email";
msg.Body = "Hi testing invoice";
msg.IsBodyHtml = true;
msg.To.Add(new MailAddress("[e-mail]"));
SmtpClient client = new SmtpClient();
client.Host = HostAddress;
client.EnableSsl = true;
NetworkCredential creadit = new NetworkCredential();
creadit.UserName = msg.From.Address;
creadit.Password = Password;
client.UseDefaultCredentials = true;
client.Credentials = creadit;
client.Port = 587;
client.Send(msg);

解决方案

Your problem is here:

client.UseDefaultCredentials = true;
client.Credentials = creadit;

You are specifying a set of credentials but you are also telling SmtpClient to use the default credentials (i.e. the Windows username and password of the logged-in user). Set UseDefaultCredentials to false and it will use your supplied credentials instead.

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