Question

I am trying to send email using c# following is my code.

try
{
    System.Net.Mail.MailMessage msg = new System.Net.Mail.MailMessage();
    msg.From = new MailAddress("[e-mail]");
    msg.To.Add("[e-mail]");//Text Box for To Address  
    msg.Subject = "Testinng subject"; //Text Box for subject  
    msg.IsBodyHtml = true;
    msg.Body = "testing comment is here..";//Text Box for body  
    msg.Priority = MailPriority.High;

    SmtpClient client = new SmtpClient("smtp.gmail.com", 587);
    client.UseDefaultCredentials = false;
    client.Credentials = new NetworkCredential("[e-mail]", "");
    client.Port = 587;
    client.Host = "smtp.gmail.com";
    client.EnableSsl = true;

    object userstate = msg;     
    client.Send(msg);
}
catch (Exception ex)
{
    throw ex;
}

Giving following exception

Answer 1

It’s common for internet providers to block the port used by SMTP, except to their own outgoing mailserver. The reason is to prevent spamming.

If that is the case for you, you need to use the mail server of your internet provider instead of the GMail server.