SmtpException while sending Email

Question

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("ramshaafaq2012@gmail.com"));
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);

Did you have a look at SmtpException.InnerException as it could contain more detailed information. — Philipp Grathwohl, Jun 26 '15 at 08:01
Do you test this code behind a proxy? If so did you configure your program to use it? Maybe a firewall is blocking your request? — Philipp Grathwohl, Jun 26 '15 at 08:31
possible duplicate of [c# SmtpClient class not able to send email using gmail](http://stackoverflow.com/questions/1311749/c-sharp-smtpclient-class-not-able-to-send-email-using-gmail) — Ignacio Soler Garcia, Jun 26 '15 at 08:32
@IgnacioSolerGarcia even the solution recommended in that post doesn't work — Nuke, Jun 26 '15 at 08:37
@PhilippGrathwohl I think I have VPN installed on my machine.How should I configure my program for that? — Nuke, Jun 26 '15 at 08:44
You can configure it in your app.config. Have a look at this link https://msdn.microsoft.com/en-us/library/6484zdc1.aspx — Philipp Grathwohl, Jun 26 '15 at 08:50

score 1 · Answer 1 · answered Jun 26 '15 at 08:11

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.

SmtpException while sending Email

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