- - Microsoft
- -- (deprecated) Microsoft Windows OS (XP/NT/Vista)
- ---- 550 "Unknown User"
glimbeek - 8:06 am on Feb 8, 2010 (gmt 0)
I removed the address form the auto complete list. Then I typed it in again, sending a new email (not a reply) and the same thing happends. I'm 100% I typed in the correct address.
We don't use a shared address book.
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