How Send mail without using password parameter in mvc?

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MVC

SMTP

private void SendEMail(string emailid, string subject, string body)
{
   SmtpClient client = new SmtpClient();
   client.DeliveryMethod = SmtpDeliveryMethod.Network;
   client.EnableSsl = true;
   client.Host = "smtp.gmail.com";
   client.Port = 587;
   // client.Host = "localhost";
   // client.Port = 25;

   System.Net.NetworkCredential credentials = new System.Net.NetworkCredential("ipower@noreply.com","123qwerty");
   client.UseDefaultCredentials = true;
   client.Credentials = credentials;

   MailMessage msg = new MailMessage();
   msg.From = new MailAddress("noreply@gmail.com");
   msg.To.Add(new MailAddress(emailid));

   msg.Subject = subject;
   msg.IsBodyHtml = true;
   msg.Body = body;

   client.Send(msg);

}

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In my server i have a mail configuration so i can use

client.Host = "localhost";client.Port = 25;

without using any credentials but the main shoud't send please help me

[edit]Code block added, tabulation reduced[/edit]