System administrator unable to send olBCC mail - vba

Question

I have a custom outlook appointment, from which I want to automatically BCC a mail upon sending my a appointment invitation.
Function Item_Send()
Set oMsg = Application.ActiveInspector.CurrentItem
With oMsg
Set objRecip = Item.Recipients.Add("MyEmail#mail.com")
objRecip.Type = olBCC
objRecip.Resolve
End With
Set oMsg = Nothing
End Function
Everything seems to work fine - My email is attached as BCC, and the appointment is successfully being send.
However, in my inbox I'm getting a mail, that the BCC mail could not be reached.
Your message did not reach some or all of the intended recipients.
Subject:
Sent: 18/06/2020 14:49
The following recipient(s) cannot be reached:
MyEmail on 18/06/2020 14:49
'MyEmail#mail.com' on 18/06/2020 14:49
This message could not be sent. Try sending the message again later, or contact your network administrator.
Diagnostic information for administrators:
Error is [0x80070057-0x00000000-0x00000000]. Submit-Message failed:
message id(23), failure enum(7), HResult(0x80070057), EC(-2147024809).
Why is this error occuring? My mail is not incorrect.

Answer 1

It is not clear where the Item object comes from.
First of all, the Type property for MeetingItem recipients can be one of the following OlMeetingRecipientType constants: olOptional, olOrganizer, olRequired, or olResource. If you want to send a BCC I'd recommend creating a new mail item and copy properties to the new item.
Anyway, the Resolve method returns a boolean value which is true if the object was resolved; otherwise, false. For example, that is how you need to check this out:
Sub AssignTask()
Dim myItem As Outlook.TaskItem
Dim myDelegate As Outlook.Recipient
Set MyItem = Application.CreateItem(olTaskItem)
MyItem.Assign
Set myDelegate = MyItem.Recipients.Add("Eugene Astafiev")
myDelegate.Resolve
If myDelegate.Resolved Then
myItem.Subject = "Prepare Agenda For Meeting"
myItem.DueDate = Now + 30
myItem.Display
myItem.Send
End If
End Sub
Be aware, the ItemSend event handler accepts two parameters. For example, the following code in VB.NET works like a charm on my machine:
Imports System.Runtime.InteropServices
' ...
Private Sub OnItemSend(Item As System.Object, ByRef Cancel As Boolean) _
Handles Application.ItemSend
Dim recipient As Outlook.Recipient = Nothing
Dim recipients As Outlook.Recipients = Nothing
Dim mail As Outlook.MailItem = TryCast(Item, Outlook.MailItem)
If Not IsNothing(mail) Then
Dim addToSubject As String = " !IMPORTANT"
Dim addToBody As String = "Sent from my Outlook 2010"
If Not mail.Subject.Contains(addToSubject) Then
mail.Subject += addToSubject
End If
If Not mail.Body.EndsWith(addToBody) Then
mail.Body += addToBody
End If
recipients = mail.Recipients
recipient = recipients.Add("Eugene Astafiev")
recipient.Type = Outlook.OlMailRecipientType.olBCC
recipient.Resolve()
If Not IsNothing(recipient) Then Marshal.ReleaseComObject(recipient)
If Not IsNothing(recipients) Then Marshal.ReleaseComObject(recipients)
End If
End Sub
This event triggers right after the user clicks the Send button in Outlook (before the inspector window is closed) or when the Send method of Outlook items is called. The ItemSend event provides two parameters to the programmer:
The Item object – an Outlook item that is going to be sent. It can be represented by the AppointmentItem, MailItem, MeetingItem, MobileItem, SharingItem, TaskItem classes.
The Cancel parameter – allows you to cancel sending in Outlook. The default value is false. If you set the Cancel parameter to true in the event handler, the sending process is canceled and the inspector window is shown to the user.
Read more about that in the How To: Change an Outlook e-mail message before sending using C# or VB.NET article.