No, Attachment Options is just for setting the registry key for blocked
attachments, it has nothing to do with what attachments are in an email.
The OP doesn't mention where the code is going to run, which is important.
If say it's running as a VBA macro that's run from a button on a toolbar on
a selected item:
Sub AttachmentsList()
Dim oMail As Outlook.MailItem
Dim colAttach As Outlook.Attachments
Dim oAttach As Outlook.Attachment
dim strAttach As String
Set oMail = Application.ActiveExplorer.Selection.Item(1)
Set colAttach = oMail.Attachments
For Each oAttach In colAttachments
strAttach = strAttach & vbCRLF & oAttach.DisplayName
Next
oMail.Body = oMail.Body & strAttach
oMail.Save
End Sub
That would write, one per line, a list of all attachment display names at
the end of the message body into that message. The message would be the one
currently selected in the folder view. No error checking in that sample,
that's an exercise for the reader.