Hi Russ, Thanks for this hint. I have a couple of questions. On 6/7/07, R P Herrold <herrold at owlriver.com> wrote: > :0fh > * ^List-Id:.*centos\.centos\.org This is a handy way of filtering by the mailing list name. Thanks. > * ^Subject:.*Some subject line here > *!^X-brand > | formail -A "X-brand: killfile " > > # and dump them > :0 w > * ^X-brand: killfile > /dev/null Could you explain why you are going through killfile here? For example, can't you just do: :0: * ^(From|Sender|Received):.*Perrin /dev/null if you do not want anything from a person named Perrin? I have lines like that in my filter (not with 'Perrin' by the way) and it seems to be working. As you can tell, I am not very familiar with procmail filter format. Akemi > -- Russ Herrold