'C# - Mail confirmation Outlook

I am developing an app that checks an Outlook mail account, finds all the attachments and then print them out. At this point, the mails analyzed are moved to another folder.

I have only one problem: sometimes, I receive some mails with reading confirmation. The app checks the attachment, and when it has to move the mail, it freezes. Then a popup appear in Outlook, about sending or not sending the reading confirmation.

Now, I want to make this programmatically, I always want to send a reading confirmation when it is requested.

I found a property (ReadReceiptRequested), set to true if there is a reading confirmation to send, but I don't know how to send it.

Here a piece of the code I use:

//I store all the emails in a List<Outlook.MailItem> named emails
Outlook.Application myApp = new Outlook.Application();
Outlook.NameSpace mapiNameSpace = myApp.GetNamespace("MAPI");
//Check if the mail has read confirmation
if (emails[right_index].ReadReceiptRequested)
{
    //How to send read confirmation?
}
//I read the mail, then I move it to another folder
emails[indice_scelto].UnRead = false;
emails[indice_scelto].Move(mapiNameSpace.Folders["New folder"]);

Could you help me?

Thanks in advance!

c++sharpemailoutlook


Solution 1:[1]

You can do that on the Extended MAPI level (C++ or Delphi) - call IMessage::SetReadFlag() - pass 0 to send read receipts or SUPPRESS_RECEIPT otherwise.

If Redemption is an option (I am its author), it exposes the RDOMail.MarkRead method that takes a SuppressReceipt Boolean parameter.

Solution 2:[2]

The Outlook object model doesn't provide any property or method. All you can is to set the UnRead property to false and Save the item.

Then you can begin synchronizing a user's folders using the specified Send\Receive group using the Start method of the SyncObject class. The Namespace class provides the SyncObjects property which returns a SyncObjects collection containing all Send\Receive groups. For example:

 Public Sub Sync() 
  Dim nsp As Outlook.NameSpace 
  Dim sycs As Outlook.SyncObjects 
  Dim syc As Outlook.SyncObject 
  Dim i As Integer 
  Dim strPrompt As Integer 
  Set nsp = Application.GetNamespace("MAPI") 
  Set sycs = nsp.SyncObjects 
  For i = 1 To sycs.Count 
   Set syc = sycs.Item(i) 
   strPrompt = MsgBox( _ 
   "Do you wish to synchronize " & syc.Name &"?", vbYesNo) 
   If strPrompt = vbYes Then 
    syc.Start 
   End If 
  Next 
 End Sub

I suppose then you can move the item wherever you need.

Sources

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Source: Stack Overflow

Solution Source
Solution 1
Solution 2 Eugene Astafiev

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