Thunderbird displays only the message count of unread mails of every folder by default. I tried to find a way to display the count of all messages instead which would help me get a better overview of the amount of mails inside a folder. I wanted to make sure that the unread messages number would still be shown as well.
The option to activate the message count for all mails is kinda hidden in Thunderbird. You need to enable the “Show Expanded Columns” option first which can be done by going to Tools > Options, selecting the Advanced tab and checking “Show Expanded Columns in the Folder Pane”.
