PR_DISPLAY_NAME of PR_MESSAGE_ATTACHMENTS when Outlook item is sent.

Jun 24, 2014 at 6:59 AM
I have composed an email, given it a subject 'Temp Sub' and saved it on the hard disk. It shows as 'Temp Sub.msg'. I composed new email and did a 'drag n drop' to it. While composing it shows as 'Temp Sub'. I have sent it and in the sent items it shows as 'Temp Sub (10 KB)'. In MFCMAPI, it shows as 'Temp Sub'.

I was expecting it to show 'Temp Sub (10 KB)' as set by the client. If the client was setting the name right I was expecting it to show 'Temp Sub.msg'
Jun 24, 2014 at 2:27 PM
When you drag an MSG to a message, Outlook bypasses the normal attachment logic. It does not attach it as a file. Instead, it attaches it as an embedded message. That (10 KB) you're seeing in the view is rendered on the fly. It is NOT part of the subject.
Jun 25, 2014 at 5:03 AM
OK. Size of the attachment (in this case 10 KB) comes in every attachment, whether the email is saved or sent.