Outlook generally strips any categories (keywords) on a message before it
goes out and if still there when it arrives.

The DASL tag urn:schemas:mailheader:keywords is used for Keywords
(categories) as a MAPI property, but as I said that's usually stripped out
from outgoing and incoming messages. In fact, Outlook 2007 has a default
rule to strip categories from mail as it arrives.

So if that tag in the Internet headers is there when the item goes out it
probably won't be there in most cases when you examine it.

--
Ken Slovak
[MVP - Outlook]
http://www.slovaktech.com
Author: Professional Programming Outlook 2007
Reminder Manager, Extended Reminders, Attachment Options
http://www.slovaktech.com/products.htm


"Nathan" wrote in message
...
Hello,

My application needs to extract values from “Keywords” outlook mail
header.
But in reply emails, I don’t see the “Keywords” header as shown in the
snippet below:


• Is “Keywords” outlook header optional?
• Is there any outlook setting that needs to be turned on? The environment
is Outlook 2003 with exchange 2003.
• Any documentation on this internet header would help?

Thanks in advance.