电子邮件发送代码在本地主机上工作但不在服务器上

Question

我用c#写了一个邮件发送代码。我的网站使用 GoDaddy 的服务器。它在本地主机（VS 2013）上工作，但是当在服务器上部署相同的代码时，它会出现以下错误：

Server Error in '/' Application.

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 [2607:f8b0:400e:c05::6c]:25

描述：在执行当前网络请求期间发生未处理的异常。请查看堆栈跟踪以获取有关错误及其在代码中的来源的更多信息。

异常详情：System.Net.Sockets.SocketException:连接尝试失败，因为连接方在一段时间后没有正确响应，或者建立连接失败，因为连接的主机有无法响应 [2607:f8b0:400e:c05::6c]:25

堆栈跟踪：

[SocketException (0x274c): A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed t SMS.Portal.SendSMS.btnSubmit_Click(Object sender, EventArgs e) in d:\Paul\ProximityMarketer\smsproximitysource\source\Portal\SendSMS.aspx.cs:30 System.Web.UI.WebControls.Button.OnClick(EventArgs e) +9633514 System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +103 System.Web.UI.WebControls.Button.System.Web...IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +10 System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +13 System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +35 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1724

版本信息：Microsoft .NET Framework version:4.0.30319； ASP.NET version:4.0.30319.34280

代码如下：

SmtpClient smtpclient = new SmtpClient();
smtpclient.Host = "smtp.gmail.com";
smtpclient.Port = 25;
smtpclient.Credentials = new NetworkCredential("xxxxx@gmail.com", "Password");
smtpclient.EnableSsl = true;
MailMessage objmsg = new MailMessage();
objmsg.From = new MailAddress("xxxxx@gmail.com");
objmsg.To.Add(email);
objmsg.Subject = "testing";
objmsg.Body = myString.ToString();
objmsg.IsBodyHtml = true;
smtpclient.Send(objmsg);

Answer 1

我找到了解决方案。有人向我推荐了这篇文章。 https://pk.godaddy.com/help/see-your-smtp-relays-3552。我使用了以下代码：

SmtpClient ss = new SmtpClient();
ss.Host = "smtpout.secureserver.net";
ss.Port = 80;
ss.Timeout = 10000;
ss.DeliveryMethod = SmtpDeliveryMethod.Network;
ss.UseDefaultCredentials = false;
ss.EnableSsl = false;
ss.Credentials = new NetworkCredential("abc@yourdomain.com", "password");

MailMessage mailMsg = new MailMessage("abc@yourdomain.com", email, "subject here", "my body");
mailMsg.DeliveryNotificationOptions = DeliveryNotificationOptions.OnFailure;
ss.Send(mailMsg);

注意：它不适用于端口 25。

电子邮件发送代码在本地主机上工作但不在服务器上

Email sending code working on localhost but not on server

c#

email

smtp

smtpclient

visual-studio-2015