From: viatrix-usenetting@purelymail.com   
      
   Colin, can you try changing the following Thunderbird preference and   
   re-sending your whitespace test? I'm told this is the Thunderbird   
   setting for disabling Format=Flowed in sent messages.   
      
   Open the Config Editor and set mailnews.send_plaintext_flowed to false.   
      
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   =f0R/   
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   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)