Cant find/see unread email in Thunderbird
For days now, Thunderbird has been showing one unread email, though I couldn’t find it using all the sort techniques I’ve had. Googling shows it’s not an uncommon occurrence. The solution is also quite easy.
Right click on the folder and choose ‘Compact‘.
Takes a minute, but it will reveal the ‘hidden’ email(s).
Source: https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/116642

