On Sun, 22 Dec 2024 16:52:28 +0100, Paul Pace <p...@mostlybsd.com> wrote: > > I don't know details of differences in mbox or maildir file formats or > the different clients, so maybe this is expected. > > I freely accept that I am no expert in how to configure OpenSMTPD. The > above configuration started with a lot of guess-and-check to get things > running in a way that works for my servers. However, note that when this > configuration was much simpler, the message was still was failing DKIM, > and it fails even for local users running the above cron job or client > servers running the same job and no matter which user is running the > job. >
mbox contains multiple emails per one file and not all tools to verify DKIM/ARC signatures supports mbox input. Usually such tools expects one email per input. Here many forks of mb2md.pl which convers mbox to maildir, that allows you to check signatures per email via find, for example. -- wbr, Kirill