asp.net send mail problem

I try to send email from my application. Everything seems ok, mailmessage, credentials etc.

When I debug the code it doesnt fall in to catch exception and doesnt send 开发者_运维知识库email. Also there is no mail queue at the server.There is no error message.

msgObj.Subject = this.Subject;        
    msgObj.From = new MailAddress(this.From , this.Display_Name);//
    msgObj.Body = this.Message;
    msgObj.IsBodyHtml = true;

    SmtpClient client = new SmtpClient(this.SMTP_Server,25);
                client.Credentials = new System.Net.NetworkCredential(SMTP_User + "@doping.com.tr", SMTP_Password);


                try
                {
                    client.Send(msgObj);
                    return true;
                }
                catch (Exception ex)
                {
                    ex.ToString();
                    return false;
                } 

What could be the problem?

Thanks.

---

The default settings of an SmtpClient can be configured using the System.Net configuration namespace, e.g:

<configuration>
  <system.net>
    <mailSettings>
      <smtp deliveryMethod="network" from="ben@contoso.com">
        <network host="localhost" port="25" defaultCredentials="true" />
      </smtp>
    </mailSettings>
  </system.net>
</configuration>

See the <smtp> Element (Network Settings) topic for more information.

---

Check for port. Is port 25 you are using support. Also check for SSL. If still not works. Try below code.

 /// <summary>
/// Transmit an email message
/// </summary>
/// <param name="from">Senders Name </param>
/// <param name="fromPerson">Sender Email Address</param>
/// <param name="body">The Email Message Body</param>
/// <returns>Status Message as String</returns>
public static void SendMail(string fromEmail, string fromName, string body)
{

    try
    {

        using (MailMessage mail = new MailMessage())
        {
            mail.To.Add("abc@gmail.com");
            mail.From = new MailAddress(fromEmail, fromName);
            mail.Subject = "Report ";
            mail.SubjectEncoding = System.Text.Encoding.UTF8;
            mail.Body = body;
            mail.BodyEncoding = System.Text.Encoding.UTF8;
            mail.Priority = MailPriority.High;
            SmtpClient smtp = new SmtpClient();
            smtp.Host = global::ProjectName.Properties.Settings.Default.Host;
            smtp.Port = global::ProjectName.Properties.Settings.Default.Port;

            if (smtp.Port == 587)
            {
                smtp.EnableSsl = true;
            }
            string userName = global::ProjectName.Properties.Settings.Default.UserName;
            string password = global::ProjectName.Properties.Settings.Default.Password;
            smtp.Credentials = new NetworkCredential(userName, password);
            smtp.Send(mail);

        }
    }

    catch (SmtpException smEx)
    {
        LogError(smEx.Message, smEx.StackTrace);
    }
}

Here I am using Settings file of the project and retrieving values from there.