SmtpDeliveryMethod.PickupDirectoryFromIis strange behavior...

Question

Hi

I think i need some guru lights!

public void SendEndingMail(string fileName)
        {
            SmtpClient client;
            client = new SmtpClient("smtp.myserver.com", 25);
            //client = new SmtpClient();
            if (!string.IsNullOrEmpty(""))
            {
                System.Net.NetworkCredential credential = new NetworkCredential("", "");
                client.Credentials = credential;
            }
            client.UseDefaultCredentials = true;
            client.DeliveryMethod = SmtpDeliveryMethod.Network;
            //client.DeliveryMethod = SmtpDeliveryMethod.PickupDirectoryFromIis;

            MailAddress fromAddress = new MailAddress("[email protected]", "Elec");
            MailAddress toAdrress = new MailAddress("[email protected]");

            using (System.Net.Mail.MailMessage mailMessage = new System.Net.Mail.MailMessage(fromAddress, toAdrress))
            {

                mailMessage.Attachments.Add(new System.Net.Mail.Attachment(fileName));
                mailMessage.IsBodyHtml = false;
                mailMessage.BodyEncoding = System.Text.Encoding.UTF8;
                try
                {
                    client.Send(mailMessage);
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message.ToString());
                }
            }
        }

Is that true that: when i set client.DeliveryMethod = SmtpDeliveryMethod.PickupDirectoryFromIis; It does not matter whichever smtp server i use

        client = new SmtpClient("smtp.myserver.com", 25);
        //client = new SmtpClient();

The both lines are the same since it will use LOCAL IIS ?!!!

Is this is true, it is not normal that the API is build this way!? it is very confusing...

Thanks Jonathan

Answer 1

Hi,

IIRC, when the SmtpClient sends the email, it looks at the .DeliveryMethod value. If the value is Network, then it sends via network. If it is PickupDirectoryFromIis, then it ignores any specified SMTP server (because it just writes and the email to the filesystem), and writes it to the Pickup directory. No network communication takes place.

Cheers!

Dave