[Users] Problem with processing rule

[Bob Williams]

The account is a gmail account. I am trying to move some messages which are filtered into a folder named "crew" to another folder. My processing rule for folder "crew" contains the following condition:

body_part matchcase "has completed a provisional membership form"

but none of the qualifying messages move to the new folder on entering "crew"

I'm not sure what I'm doing wrong.

Bob
-- 
Bob Williams
   System:  Linux 4.4.120-45-default
   Distro:  openSUSE 42.3 (x86_64)
   Desktop: KDE Frameworks: 5.32.0, Qt: 5.6.2 and Plasma: 5.8.7
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