C# Email Problem

[dkate777]

It's anybody know where to look and what to check?
My sent email work fine from several forms, but in one day, everything stop working and i got this error message:

The SMTP server requires a secure connection or the client was not authenticated. The server response was: regor.lunarpages.com ESMTP MailEnable Service, Version: 0-2.37- denied access at 10/02/07 18:53:41

Please, help......i can't figure out second day what's going on

[Shashi Sadasivan]

It's anybody know where to look and what to check?
My sent email work fine from several forms, but in one day, everything stop working and i got this error message:

The SMTP server requires a secure connection or the client was not authenticated. The server response was: regor.lunarpages.com ESMTP MailEnable Service, Version: 0-2.37- denied access at 10/02/07 18:53:41

Please, help......i can't figure out second day what's going on

Hi,
seems the settings of the SMTP server was changed while you were away.
An authentication is required now
check this

cheers

[dkate777]

I sow this already and i am sending email exactly how he explain in this article, this is my code sample:

public void SendEmail()
{
try
{
string fromEmail = Constants.EMAIL_SENDER_ADDRESS;
string toEmail = Constants.EMAIL_SENDER_ADDRESS;// Constants.ADMIN_EMAIL;
string subject = "Feedback: " + txtSubject.Text;
string body = "This Message was posted in Feedback Section of " body = body + "<br><br>";
body += txtMessage.Text;

MailMessage message = new MailMessage(fromEmail, toEmail, subject, body);

message.IsBodyHtml = true;
SmtpClient mailClient = new SmtpClient(Constants.SMTP_CLIENT);
mailClient.Host = Constants.EMAIL_HOST;
System.Net.NetworkCredential nCredentials = new System.Net.NetworkCredential(Constants.EMAIL_SENDE R_ADDRESS, Constants.EMAIL_SENDER_PASSWORD);
mailClient.Port = 25;
mailClient.UseDefaultCredentials = false;
mailClient.Credentials = nCredentials;
// mailClient.EnableSsl = true;
mailClient.Send(message);
lblError.Text = "Your Message Has Been Sent.";
txtSubject.Text = "";
txtMessage.Text = "";
}
catch (Exception exc)
{
lblError.Text = "Your Message Could Not Be Sent.";
}
}