ERROR: The "envelope_sender_header" in your spam.assassin.prefs.conf

[Greg J. McGreevy]

When I run the mailscanner check I get the following error
 
I have edited the file to match the %org-name% and have tried multiple combinations but I continue to get the error what is the correct format to fix this error
 
here is what I have tried (mydomain is exactly what is in the %org-name% in my Mailscanner.conf)
 
X-mydomain-MailScanner
 
X-mydomain-COM-MailScanner
 
mydomain-MailScanner
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