maildrop mailfilter syntax

["Russell L. Harris" <rlharris@xxxxxxxxxx>]

I am switching from Gnus to Mutt, and am using maildrop to provide the 
sorting which I previously was doing with Gnus.  The processing chain

   pop3.isp.com -> getmail4 -> maildrop -> [ maildir structures ] -> mutt

is handling incoming mail, but maildrop is delivering all messages to 
the default maildir "~/mail/nondescript"; so it appears that there is an 
error in the syntax of "~/.mailfilter".  At first, I suspected that the 
characters '[' and ']' were causing a problem, but even mail which 
SpamAssassin (running at my ISP) flags with the word "SPAM" in the 
subject line is being delivered to "~/mail/nondescript".

Here are my mailfilter instructions:

   DEFAULT=$HOME/mail/nondescript

   # spam is flagged by SpamAssassin at the ISP

   if ( /^"Subject:".*"SPAM"/ )
   to spam

   if ( /^("To"||"Cc")":".*"debian-user"/ )
   to computer/debian

   if ( /^("To"||"Cc")":".*"mutt-users"/ )
   to computer/mutt

   if ( /^"Subject:".*"[alsa-user]"/ )
   to computer/alsa

   to $DEFAULT


RLH