I want to send email through my ASP.Net website - asp.net

Question

the email code works on local host but when i upload the website on server it shows error
The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.5.1 Authentication Required. Learn more at
//Formatted
protected void btnSend_Click(object sender, EventArgs e)
{
var fromAddress = "djdanny1255#gmail.com";
string email = "djdanny1255#gmail.com";
var toAddress = email;
const string fromPassword = "********";
string subject = "Email=" + txtEmail.Text + " Phone=" + txtMobile.Text;
string body = txtMessage.InnerText;
try
{
using (MailMessage mm = new MailMessage(fromAddress, email))
{
mm.Subject = subject;
mm.Body = body;
mm.IsBodyHtml = false;
SmtpClient smtp = new SmtpClient();
smtp.Host = "smtp.gmail.com";
smtp.EnableSsl = true;
NetworkCredential NetworkCred = new NetworkCredential(fromAddress, fromPassword);
smtp.UseDefaultCredentials = true;
smtp.Credentials = NetworkCred;
smtp.Port = 587;
smtp.Send(mm);
}
}
catch (Exception ex)
{
Response.Write("Error" + ex.Message);
}

Answer 1

in first cas, i suggest you to change code at this code :
using (MailMessage mail = new MailMessage())
{
mail.From = new MailAddress(fromAddress);
mail.To.Add(toAddress);
mail.Subject = subject;
mail.Body = body;
mail.IsBodyHtml = true;
using (SmtpClient smtp = new SmtpClient())
{
smtp.Host = "smtp.gmail.com";
smtp.Port = 587;
smtp.EnableSsl = true;
smtp.DeliveryMethod = SmtpDeliveryMethod.Network;
smtp.UseDefaultCredentials = false;
smtp.Credentials = new NetworkCredential(fromAddress,fromPassword);
smtp.Send(mail);
}
}
and second after your Login in to your email, CLICK HERE .
This will see this page
i hope this help you ^^