Usually this means a misconfigured firewall. Outlook needs to be able to
send confirmation packets back to the server or the server will offer them
again. You can verify this by disabling your firewall and see if it still
happens (note that you have to send/receive at least twice as the first time
you'll send the confirmation packets upon receiving of the items). If it is
working correctly now reconfigure your firewall and enable it again.
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Roady www.sparnaaij.net
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Generally, if Outlook can send the commands to download the messages,
commands to delete them should get through as well (unless the firewall is
selectively blocking DELE commands). It's *very* unlikely to be a firewall
problem.
Owen, what version of Outlook are you running? Have you applied any service
packs? What sort of connection (dial-up, broadband, other)?