Chuck Charlton followed up,
| This morning I ran about twenty tests trying different
| permutations, and I believe that it is the | formail line that is
| failing. ^^^^^^^
If you're relying on a belief, that must mean that you don't have hard
evidence. What does a verbose logfile say?
My first guess is that maybe you have a stray space character to the right of
the backslash. My second guess is that there really is a subject line after
all (though your original regexp was equivalent to the one I used); can you
show us a sample of the message that's supposed to get filtered?
My third guess is that something is messed up with your setting for $SHELL.
| > :0fhw
| > * ^From:.*[ <]root(_at_)well\(_dot_)com
| > * !^Subject:
| > | formail -i "Subject: http://www.well.com/user/chuck/calendar"; ; \
| > echo "Calendar update at http://www.well.com/user/chuck/calendar"; ;
echo
That still looks right to me.
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