Change domain to fqdn and extraDomains to domains

mail-server/systemd.nix

@@ -23,10 +23,10 @@ let
         ''
           # Create certificates if they do not exist yet
           dir="${cfg.certificateDirectory}"
-          fqdn="${cfg.hostPrefix}.${cfg.domain}"
+          fqdn="${cfg.fqdn}"
           case $fqdn in /*) fqdn=$(cat "$fqdn");; esac
-          key="''${dir}/key-${cfg.domain}.pem";
-          cert="''${dir}/cert-${cfg.domain}.pem";
+          key="''${dir}/key-${cfg.fqdn}.pem";
+          cert="''${dir}/cert-${cfg.fqdn}.pem";
 
           if [ ! -f "''${key}" ] || [ ! -f "''${cert}" ]
           then
@@ -50,7 +50,7 @@ let
           then
 
               ${pkgs.opendkim}/bin/opendkim-genkey -s "${cfg.dkimSelector}" \
-                                                   -d ${cfg.domain} \
+                                                   -d ${cfg.fqdn} \
                                                    --directory="${cfg.dkimKeyDirectory}"
               chown rmilter:rmilter "${dkim_key}"
           fi