procmail/formail to change subject?

[Lev Lvovsky <lists1@sonous.com>]

I'm using procmail to process a number of mailing lists.  Having just
subscribed to several Debian lists, and having them all be delivered to a
"Debian" mailbox, I'd like to make it obvious which specific debian list
they are all from (and I don't want to make extra mailboxes for each
list).

Is it possible to put something like "[user]", and "[security]" in front
of the appropriate messages?  Could this account for replies also, where
it'd put "Re: [user]" instead of "[user] Re:"?

dunno if this is a tall order.

thank you!
-lev

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"Persons of leisurely moral growth often confuse giving with taking." 
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