Thunderbird automatically marks messages as read when I delete the message above it.
When I delete a message from the inbox listing of messages then, of course, all the messages below it move up. But a problem occurs if the message that then occupies the place of the deleted message in the list was previously unread (bold). What happens is that Thunderbird immediately un-bolds that message so that the message no longer appears as an unread (bold) message, even though I haven't opened it.
Alle antwurden (1)
Here is one remedy: https://addons.thunderbird.net/en-us/thunderbird/addon/deselect-on-delete-tb78/