Hello, I have looked over that usage pattern over the procmail doc and mailing lists for some time now, and it seems no one ever asked the question: Would it be possible to reuse a part of the match regexp in procmail so it can be reused in the action part of the rule. Something like the following: --------8<----------------8<----------------8<---------------8<-------- :0:notmuch.lock * .*foo\+\(\w+\)@mydomain\.tld.* { TAGS="${TAGS} $1" } -------->8---------------->8---------------->8--------------->8-------- where "$1" would be the group match (like `\1` in sed). I used to do it easily when I was using sup, and I really miss it now that I have switched to notmuch. Maybe I shall use another mail matching program like formail, or shall I write a patch for it, but I'd like first to ask here if someone had the same issue, and found a solution. -- Guyzmo