Thunderbird deletes previous day's mail on boot up
When I boot up Thunderbird, you can momentarily see the mail from the previous day then BANG, they are all deleted. There's no sign of them in the deleted mail folder, they are just purged from the program. I can;t see I have ticked a "Delete previously received message" option!
Anyone seen this, or know what on earth it could be? I have installed TB a zillion times before and never seen this behaviour!
Thanks.
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