Check your junk filter settings. https://support.mozilla.org/kb/thunderbird-and-junk-spam-messages

Hello christ1, thanks for your reply. But I had already read that before I asked you.

My problem is that I have two folders (Junk and Suspected Spam) and don't know how they work together. This interaction is not described in the instructions (your link) either.

The junk filter will probably load into the Suspected Spam folder. After working through the emails there, there are now emails with and without junk flags. But what happens then?

With best regards

What is your account type - POP or IMAP?

My account type is IMAP.

My problem is that I have two folders (Junk and Suspected Spam) and don't know how they work together.

That's one too many. You'll have to find out to which folder messages classified as 'Junk' will be sent to. A pragmatic way to test this is to mark a message as 'Junk', and check where it goes to. You may also check your account via webmail to determine which folder is the one used by your email provider's server. What makes things more difficult is a bug introduced recently, where Thunderbird shows the spam folder used by your email provider's server, e.g. 'Suspected Spam', just as 'Junk'. That bug will be fixed in TB 144 to be released in about two weeks time. So if you're unsure about the correct folder you may just wait until then.

Hello christ1,

It's been a while, but the problem still hasn't been solved! Thunderbird version 144.0.1 (64-bit) is installed.

1. In Thunderbird on my laptop, I only see the English folder names (sent, junk, etc.). On Thunderbird on my smartphone, however, I see English AND German. In GMX FreeMail, German and English folder names are also visible on both devices. This is probably due to a Thunderbird synchronization error. In any case, the latest version of Thunderbird has not corrected this error. The contents of the “Gesendet” folders are not identical to the “Sent” folder! This means I am losing emails!!!!

2. The problem with a “Junk” folder and another “Suspected Spam” folder also persists. Thunderbird regularly shows me emails in the “Suspected Spam” folder whose senders have long been declared as spam and which I manually mark as junk again and again in order to move them to the “Junk” folder.

I can't work like this. If there is no solution, I will have to switch to better email software.

Best regards, Peter

Translated with DeepL.com (free version)

TB 145.0 will be released next week. See if that will resolve any of your issues.

Cristo 1 ma la versione 145.0 è già stata scaricata? In questo momento, 14 novembre 2025, i nomi delle cartelle sono ancora in inglese anzichè in italiano. Ringrazio. Walter Luksch

TB 145.0 is available now. Check for Updates.

Cristo 1 Ho scaricato 145.0, che infatti è la versione attualmente in uso. Tuttavia le cartelle hanno ancora nome in inglese; cestino è trash, posta inviata è sent. Che devo fare per avere le cartelle in italiano? Ringrazio. Walter Luksch