Delivery Receipt with CDOSYS

[fototex]

Hi friends,

I am sending an e-mail to my customers who have completed their credit card transaction. Within my e-mail I wish to get the information whether the cdosys e-mail has ben successfully delivered to the mailbox of the customer.
I could not find out the correct line of code to insert into my code.

Here is the code I use for sending the e-mail:
<%
Dim ObjSendMail
Set ObjSendMail = CreateObject("CDO.Message")

ObjSendMail.Configuration.Fields.Item ("http://schemas.microsoft.com/cdo/configuration/sendusing") = 2
ObjSendMail.Configuration.Fields.Item ("http://schemas.microsoft.com/cdo/configuration/smtpserver") ="mail.example.com"
ObjSendMail.Configuration.Fields.Item ("http://schemas.microsoft.com/cdo/configuration/smtpserverport") = 25
ObjSendMail.Configuration.Fields.Item ("http://schemas.microsoft.com/cdo/configuration/smtpusessl") = False
ObjSendMail.Configuration.Fields.Item ("http://schemas.microsoft.com/cdo/configuration/smtpconnectiontimeout") = 60

ObjSendMail.Configuration.Fields.Item ("http://schemas.microsoft.com/cdo/configuration/smtpauthenticate") = 1
ObjSendMail.Configuration.Fields.Item ("http://schemas.microsoft.com/cdo/configuration/sendusername") ="[e-mail]"
ObjSendMail.Configuration.Fields.Item ("http://schemas.microsoft.com/cdo/configuration/sendpassword") ="password"
ObjSendMail.bodyPart.Charset = "utf-8"
ObjSendMail.Configuration.Fields.Update

ObjSendMail.To = session("Email")
ObjSendMail.Subject = "Your Example.com Orders"
ObjSendMail.From = "[e-mail]"

ObjSendMail.TextBody = "Order1, Order2... No problems with that part."

ObjSendMail.Send

Set ObjSendMail = Nothing
%>

----------------------------------------------------------

So which code should I insert beginning with "ObjSendMail"

Thank you for your comments.

[marcel]

Here is info on requesting a Read Receipt and a Delivery Status Notification:

[support.microsoft.com...]

[fototex]

Yes I have read that article before. It is the

cdoDSNFailure and
cdoDSNSuccess properties.

But how to use them with the "ObjSendMail." syntax?

Thanks for comments

[marcel]

But how to use them with the "ObjSendMail." syntax?

doesn't

ObjSendMail.DSNOptions = cdoDSNSuccessFailOrDelay

work?

[fototex]

I have used it as it is and tried to send several mails with it.
The mails did arrive as usual, but the code did not inform me with any messages whether the mail has arrived or not.

[marcel]

As far as I know, most Mail servers (and users, including myself) disable delivery status and read receipt notifications for privacy and security reasons.

Imagine if a spammer could spam random email addresses, requesting and receiving a Delivery status for each mail. It would be an easy way of getting a list of active email addresses.