I'm caught & dead in the water. Upon opening Outlook 2007 (12.0.6536.5005) it immediately tries to send a msg in its Outbox. But it fails and crashes. Debug file claims that OUTLMIME.DLL is the module in question (v.12.0.6528.5000). Running XP Pro with SP3 Build 2600. (I think the msg is in the Outbox because Outlook crashed will initially trying to send it. The msg was a reply to an inbox msg.) Any ideas would be greatly appreciated, thanks.