I am revisiting my config and my config was made a long time ago (before relay_restrictions)
Would this be a good restrictions set? I think it is but I’m not 100% certain if this is efficient for instance. For instance, I am blocking reject_non_fqdn_recipient in smtpd_recipient_restrictions without the permit_mynetworks and such first. Isn’t it then not more efficient to do that at the start of smtpd_relay_restrictions? And I also wonder if it isn’t better to remove permit_mynetworks from smtpd_relay_restrictions so that if a device has broken into my network (e.g. via Wifi), it cannot spam the world without authentication.