How to send mail in c# using exchange server 2010 without NetworkCredential

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Anyone Help Me Please.
How to send mail in c# using exchange server 2010 without NetworkCredential
Now, I'm coding in C# using SmtpClient But I don't use Email and Password in NetworkCredential

public static void SendMailTest(string toMailId, string ccMailId)
{
string SMTP_Server_var = SMTP_Server;
int SMTP_Port_var = Convert.ToInt32(SMTP_Port);
string fromMailId = SMTP_Login;
string fromMailPassword = SMTP_Password;
string mailnoreply = "no-reply@xxx.com";
MailMessage mailmsg = new MailMessage();

mailmsg.From = new MailAddress("xxx@xxx.com", SystemEmail);
string From = mailmsg.From.ToString();

mailmsg.To.Add(toMailId);
mailmsg.CC.Add(ccMailId);
mailmsg.Headers.Add("Reply-To", SystemEmail);
mailmsg.ReplyTo = new MailAddress(SystemEmail); //Set Reply To Complete
mailmsg.Subject = subject;
mailmsg.Body = body;

mailmsg.SubjectEncoding = System.Text.Encoding.Default;

SmtpClient objclient = new SmtpClient(SMTP_Server_var, SMTP_Port_var);

objclient.UseDefaultCredentials = true;
objclient.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;

objclient.Send(mailmsg);
}

In Above Code is Return Error :
Mailbox unavailable. the server response was: 5.7.1 client does not have permissions to send as this sender
When Send From C# Class, I used with Web Application
So I want to found Solution to Solve This Error

Thank You Very Much.

Posted 14-Oct-13 15:04pm

supanut 2013

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Prasad Avunoori · Answer 1 · 2013-10-15T03:07:00

Solution 1

XML

SmtpClient smtp = new SmtpClient();
smtp.Host = "<My smtp.Host>";
smtp.EnableSsl = false;
smtp.Credentials = CredentialCache.DefaultNetworkCredentials;
smtp.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;
smtp.Send(message);

Posted 15-Oct-13 3:07am

Prasad Avunoori