Piping into a variable

Looking through the archive, I found examples of setting a variable's value
using extract and $MATCH:

* ^Subject:.*\/[^         ].*
      { SUBJECT=$MATCH }

But the man page implies that using the following format will also work:

SUBJECT=| formail -xSubject:

I realize that this will also give me a leading space, but I'm not concered
about that. The following doesn't seem to work for me though:

:0
1=| formail -xTo:
2=| formail -r
3=| formail -xSubject:
| perl ./tester.pl "$1" "$2" "$3"

Any insights as to what newbie mistake I'm making?

Steve Cochran
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