I have a PC with Outlook 2003 which keeps messages with attachments in the Outbox. Sometimes recipients report they have recieved several hundred copies of the email. I believe the above problem is responsible so every scheduled send/recieve sends a duplicate copy. The system is WinXP sp2 with all windows updates and Outlook 2003 also has all updates. I am using Trend Internet Security 2008 and connecting via BT with a homehub. I have used Housecall and Kaspersky housecall to scan for malware but found none apart from a few cookies, so i dont believe this is the work of a virus but of misconfig/user error somewhere.