Are you sure they are not delivery receipts? What version of Outlook and is this a Home installation or a corporate one? Did corporate set a GPO to override user preferences?
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Milly Staples [MVP - Outlook]
Post all replies to the group to keep the discussion intact. All
unsolicited mail sent to my personal account will be deleted without
reading.
After furious head scratching, Margow asked:
| I have ticked the box never send read receipts, but outlook
| automatically sends them.