Ah, thanks! I wondered where the aforementioned "on behalf of" came from. OE doesn't add anything even with the Sender: header present.
FWIW, Outlook Express was stupidly named. If you look at the EXE its actually "IMN.EXE" which came with IE 4 and earlier and was known as "Internet Mail and News". With IE 5 it was renamed Outlook Express - because someone at MS thought "outlook" was the name for all their email products.
Since Outlook and OE work dramatically differently (the former has a plugin provider model, the latter is POP3 or IMAP only) the only sensible thing was to change the name.
So in Vista it became "Windows Mail" and then in Win 7 no mail client is included. You can now download "Windows Live Mail" for Win7 or earlier, and its based on the IMN/OE code.
Outlook does the "on behalf of" because in corporates its common to have delegation of mail to a PA or secretary etc. OE doesn't support any of this as its a single PC tool.
James -
be* pro - on THFB - sync about 17.2mbps -
BQM