(In reply to yosukematsumura from comment #9) > Seems like it's more likely to work if you don't engage the Unified Folder view until *after* you've set up **all** of your mail accounts first (and made sure all your folder settings are correct for each account). I can see a problem which would cause accounts added after Unified Folders is turned to not have their Spam/Junk folder added to the unified Spam folder. That is probably the cause of this bug and bug 1845544. > This is far from ideal, but I was able to "fix" this issue by wiping out my accounts and profile and setting up my mail accounts from scratch. Even then, it took a couple tries before it got it right. If you right-click on the unified folder and click on Properties, you can choose the folders that the unified folder looks in.
Bug 1838672 Comment 13 Edit History
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(In reply to yosukematsumura from comment #9) > Seems like it's more likely to work if you don't engage the Unified Folder view until *after* you've set up **all** of your mail accounts first (and made sure all your folder settings are correct for each account). I can see a problem which would cause accounts added after Unified Folders is turned on to not have their Spam/Junk folder added to the unified Spam folder. That is probably the cause of this bug and bug 1845544. > This is far from ideal, but I was able to "fix" this issue by wiping out my accounts and profile and setting up my mail accounts from scratch. Even then, it took a couple tries before it got it right. If you right-click on the unified folder and click on Properties, you can choose the folders that the unified folder looks in.