[Gllug] inconsistent list Precedence list header

[Stig Brautaset]

Hi there.

I'm using a procmail rule to filter list messages based on the  
Precedence: header, which on every list I'm on is set to "list" or  
"bulk". The rule looks like this:

:0
* ^Precedence: (list|bulk)$
{
   :0
   * ^X-(Beenthere|Loop): \/[^ @]+
   .lists.`echo $MATCH | sed 's/\.//'`/

   # generic list thing
   .lists/
}

This has worked reliably for me for a long time. That is, until a  
couple of days ago when I subscribed to this list again. Every time  
Peter Grandi sends an email he breaks my filtering; all his messages  
have precedence "air-mail". So, now I'm wondering: has this worked  
for me out of sheer luck? Or is it a bug with the gllug list that it  
is not setting the precedence header correctly if it is already set?

Stig
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