Hello, On 2022-10-04 14:04, Petter Reinholdtsen writes: > I would like to tag all emails with a specific header, but fail to find > a way to do this. Is this a missing feature in notmuch? > > To be specific, I want to filter out emails related to request tracker > tickets owned by me at the time of the email. These emails get a simple > RFC 822 style header in each email, that look like this: > > RT-Owner: myusername > > I tried searching for 'RT-Owner' without any success, and have read the > normuch-search-terms(7) dokucmentation trying to find a clue. Is there > something obvious I am missing. I use afew for that, with rules like this: [HeaderMatchingFilter.1] header = List-Id pattern = discuss.ocaml.org|caml-list.inria.fr tags = +caml;+lists I only run it on new mail. If you run afew without the --new flag, I think it applies it to all mail. Best, Alan