"Spam (All)" folder missing in Apple Mail „Favourites“ – how to restore?

Hello everyone,

in my Apple Mail app on Mac, I used to have a folder called "Spam (All)" that collected all spam emails from my accounts. Recently, this folder disappeared, and now I have to check each account individually to find and delete spam messages.

Here’s what I’ve already tried unfortunately without success:

1. Checked if the folder was hidden (via "Edit" in the sidebar) - it was not.

2. Reviewed all my email accounts settings in "Mail > Settings" to ensure the spam folder is assigned correctly - they were.

3. Forced synchronization of all email accounts - did not help.

4. Verified IMAP folder subscriptions to ensure the "Spam" folder is enabled - it was.

Despite all these efforts, the "Spam (All)" folder hasn’t reappeared.

Does anyone know how I can restore this folder?

I’m using the latest version of macOS Ventura 13.7.1.

Many thanks in advance!