SmtpClient：A连接尝试失败，因为连接的方没有正确一段时间后，响应 [英] SmtpClient: A connection attempt failed because the connected party did not properly respond after a period of time

问题描述

虽然有电子邮件在C＃.NET在Visual Studio 2008发送工作我得到了以下错误

While working with Email sending in C#.NET in visual studio 2008 i got the below error

一个连接尝试失败，因为连接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74.125.53.108:25

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 74.125.53.108:25

但同样的代码在其他一些PC工作正常，但是当我今天测试它给我的错误在发送（）方法...还我的网络连接良好，其中i正在测试的电子邮件代码..

But the same code was working fine in some other PC but when i am testing today it gives me error in Send() method... Also my network connection is good where i am testing the email code..

下面是我的电子邮件代码

Below is my email code

MailMessage mail = new MailMessage();
mail.To.Add(to);
mail.From = new MailAddress(from);
mail.Subject = subject;
mail.Body = body;
mail.IsBodyHtml = true;
SmtpClient smtp = new SmtpClient();
smtp.Host = "smtp.gmail.com";
smtp.Credentials = new System.Net.NetworkCredential("[e-mail]",
                                                            "MyPassword");
smtp.EnableSsl = true;
smtp.Send(mail);

有什么能为这种错误的原因.. ???

What could be the reasons for such error..???

推荐答案

下面的代码为我工作。你的代码是给我的错误，我相信这是由于没有设置端口为587

The following code works for me. Your code was giving me errors, I believe it was due to not setting the port to 587.

的 http://forums.asp.net/t/1250771.aspx/4/10

MailMessage mail = new MailMessage();
mail.To.Add(to);
mail.From = new MailAddress(from);
mail.Subject = subject;
mail.Body = body;
mail.IsBodyHtml = true;
SmtpClient smtp = new SmtpClient("smtp.gmail.com",587);
smtp.EnableSsl = true;
smtp.UseDefaultCredentials = false;
smtp.Credentials = new System.Net.NetworkCredential(address, password);
smtp.Send(mail);

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