I want to send mail from exchange server. I want to send mail without password. I use the following code snippet :
MailMessage msg = new MailMessage();
            msg.Subject = "Reg : Timesheet";
            msg.IsBodyHtml = true;
            msg.Body = "<html><body>" + strMsg +  "</body></html>";
            SmtpClient client = new SmtpClient("IP address of server", 25);
            client.Host = "IP address of server";
            client.Send(msg);
 
But unable to send mail..  Is there any other settings to be done for exchange server ?