Sending Mails

Iam sending mail with an Image in

When Iam running(Debugging) this application from system, It is working properly but mails are going to Spam.

When Iam running(Debugging) this application from Server. Mails are going to C:\Inetpub\mailroot\Queue, but it's not delivering.

Finally I hosted in IIS. And Iam running through intermnet,At the time Iam getting the Exception like this  "Cannot get IIS pickup directory"

Please give the solution for this........
string ToName=dtSelect.Rows[i][1].ToString();
                    string ToEmailID = dtSelect.Rows[i][2].ToString();
                    MailMessage mail = new MailMessage();
                    mail.Priority = MailPriority.High;
                    mail.From = new MailAddress("","ISiTech");
                    mail.Subject = "ISiTech BRIDGE Program";
                    string Body = "<b>Dear "+ToName+" !!!</b><br><img alt=\"\" hspace=0 src=\"cid:imageId\" align=baseline border=0 ><br> For More Details";
                    AlternateView htmlView = AlternateView.CreateAlternateViewFromString(Body, null, "text/html");
                    LinkedResource imagelink = new LinkedResource(Server.MapPath(".") + @"\bridge.jpg", "image/jpeg");
                    imagelink.ContentId = "imageId";
                    imagelink.TransferEncoding = System.Net.Mime.TransferEncoding.Base64;
                    SmtpClient smtp = new SmtpClient("Here I gave System IP Address", Port);
                    smtp.DeliveryMethod = SmtpDeliveryMethod.PickupDirectoryFromIis;
                    mail.Priority = MailPriority.High;

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Rahul Goel ITILConnect With a Mentor Senior Consultant - DeloitteCommented:

Add these two line it will work!
mail.PickupDirectoryLocation = "\\Isasrv\PickUp2"
mail.DeliveryMethod = SmtpDeliveryMethod.SpecifiedPickupDirectory

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Rahul Goel ITILSenior Consultant - DeloitteCommented:
MailObj.PickupDirectoryLocation = "\\Isasrv\PickUp2"
MailObj.DeliveryMethod = SmtpDeliveryMethod.SpecifiedPickupDirectory
mannevenuAuthor Commented:
Dear Rahu....

I had added to line code which was given by you.
But Iam not getting PickupDirectoryLocation and DeliveryMethod function through mail object.
I got through smtp object. So I added in this way.

               smtp.PickupDirectoryLocation = "\\Isasrv\\PickUp2";
               smtp.DeliveryMethod = SmtpDeliveryMethod.SpecifiedPickupDirectory;
when iam running through internet Iam getting the exception like this:  Failure sending mail.

Could give me the solution
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