I didn't see anything obvious in the list archives or associated man pages on this:

I want to re-write the Subject: of messages using other header criterion. I'm fetchmail(1)'ing a catch-all into a global account and I want to tag message to virtual users in the Subject. Normally I would just put them into sub-folders, but I'm feeling adventurous. I can visual what I want to do in procmail, but not maildrop syntax; I want to 'tag' messages. I've manage to hack something ugly together that is functional, but it exec's a lot of sub-shells and I'm almost certain it could be done more efficiently.

I was very surprised to learn that reformail(1) doesn't have a macro for 'original header value' that i could use as an escape sequence (%orig, etc.)

In fact, why do we even have to call an xfilter? Couldn't we use maildrop's regex and variable assignment code to do string manipulation?

Thoughts?

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VERBOSE=9 DEFAULT="$HOME/Maildir" logfile "$HOME/mailfilter.log"

if ( /^(To|[Cc][Cc]): (noc|abuse|info|sales|help|support|etc).*/ ) { LADDR = `echo $MATCH | sed 's/To://g'`

if ( /^Subject:.*/ ) { LSUBJECT = `echo $MATCH | sed 's/Subject://g'` }

xfilter "/usr/pkg/bin/courier/reformail -I'Subject: [$LADDR] $LSUBJECT'" to "$DEFAULT" }