You should be able to turn it back on. If it won't stick it might be a
security program blocking the Registry change it needs to make. A few of
the programs now doing this a
Ad-aware's Ad-Watch
McAfee VirusScan and/or Antispyware
Norton AV
Spyware Blaster
Spybot Tools IE Tweaks
Spybot- Teatimer
Spysweeper
Windows Defender
Zone Alarm (free) 6.5 Reported to be fixed in later versions.

In the case of Zone Alarm 6.5 or Norton 2007 it actually has to be
uninstalled. Make sure the Windows Firewall is turned on until you
reinstall Zone Alarm.

Boot into Safe Mode with Networking with Networking and try the change.

"Ace Tan" wrote in message
...
Hi Frank,

Seems like the setting for Leave a copy on server still goes off after I
have disable email scanning.

Frank Saunders, MS-MVP OE/WM wrote:
"Ace Tan" wrote in message
...

i have no anti-spam applications installed on the pc. Scanning of
inoming/outgoing email by anti-virus application is activated.

What is happening is that the anti-virus is interposing a proxy between
OE and the mail server. It is telling OE that the mail was sent even
though the server timed out and the mail was never actually sent. Turn
off email scanning. See my first post.