Hi folks,

It seems that it is required to authenticate against an exchange server
(relay), if you want to send e-mail using SMTP in ASP.NET 2.0.  But how do
you ensure that the credentials you are sending are not clear text over your
network.  Does this require the installation of a digital certificate on the
web server?  The code below has smtp.EnableSsl = true.  Does this imply that
there is a digital certificate installed in IIS, or is this a feature of
Exchange?  And if this is in exchange does the exchange administrator need to
enable SSL?

Thanks in Advance...Ed.

MailMessage mail = new MailMessage("Joe.Smith@Mymail.com",
"Joe.Smith@Mymail.com"); mail.Subject = TextBox1.Text;
mail.Body = TextBox4.Text;
SmtpClient smtp = new SmtpClient("smtp.MyMail.com", 23);
smtp.Credentials = new NetworkCredential("barbara.prueba@gmail.com", "xxxxx");
smtp.UseDefaultCredentials = false;
smtp.EnableSsl = true;
smtp.DeliveryMethod = SmtpDeliveryMethod.Network;
smtp.Send(mail);