Why no preline in .qmail?

[jerm]

the standard toaster-watcher.conf includes the line

qmailadmin_spam_command         = | /usr/local/bin/maildrop /usr/local/etc/mail/mailfilter

I'm curious why preline isn't in there to tack on the Returnpath.  It's a rather nice piece of info to have.

thanks

jerm

[matt]

What is so "nice" about having the Returnpath in the message?  Most folks wouldn't know what it is or why it's there. So why bother having it enabled by default?