How can I correct a "read" and "unread" indicator?
In my Inbox, whenever I click on an e-mail, the one listed underneath it also turns from a bold listing (unread) to a grey listing, indicating that it has been read, when it actually has not been. How can I correct this? Is there a format that I need to change?
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To diagnose problems with Thunderbird, restart Thunderbird with add-ons disabled (Thunderbird Safe Mode). On the Help menu, click on "Restart with Add-ons Disabled". If Thunderbird works like normal, there is an Add-on or Theme interfering with normal operations. You will need to re-enable add-ons one at a time until you locate the offender.