Joshua Branson writes: Just an update on progress. The main thing to report is that the best place to find the task list is here: https://notabug.org/jbranso/linode-guix-system-configuration/src/master/opensmtpd.org The best place to find a good example configuration will always be found here: https://notabug.org/jbranso/linode-guix-system-configuration/src/master/opensmtpd.org#example-configuration The main thing that I am focusing on now is how to make it easy for users of this service to use opensmtpd filters: search for "enable to do dkimsigning or bogofilter" is the file and you'll see where it is. for some reason the link is REALLY long when I try to paste it in this email. Thanks, Joshua