At closer inspection it appears that the ability to run filters against
a folder in particular in Message Filters and Run Filters on Folder
is broken but that automatic filtering based on the same filters works.
So if it filters the mail properly automatically it looks like it works,
but if you
Also see https://bugzilla.mozilla.org/show_bug.cgi?id=380577
** Bug watch added: Mozilla Bugzilla #184490
https://bugzilla.mozilla.org/show_bug.cgi?id=184490
** Also affects: thunderbird (upstream) via
https://bugzilla.mozilla.org/show_bug.cgi?id=184490
Importance: Unknown
