Thunderbird did something strange to me today and it downloaded all the messages from the server again, except for today's, I entered the mail server and today's messages are there, I use thunderbird to manage my emails, I would need to force downloading the email messages that are on the server, with this I would ensure that today's messages are downloaded. The new ones do come in, but the messages prior to opening Thunderbird are not downloaded, because I understand that they are marked as having already been downloaded, I would like to force the download of all the messages found on the mail server . Please let me know if someone can help me.