Outlook Read Receipt not saved

See more:

VB

Outlook

email

Hello Everyone,

I've done a short program to save my emails in a folder, and have them in the (.MSG) format. However, i can't save the "Read Receipts" and "Delivery Receipts".

Before the saving, i check if the selected items are mailitem :

If TypeOf (i) Is Outlook.MailItem Then

And "Read Receipts" and "Delivery Receipts" seems not to be emails items.
How can i select them, and how to save them ?

Do i check the HTML header ?
Subject: =?Windows-1252?Q?Read:

Does someone have a solution ?

Thanks