diff --git a/nixbld-etc-nixos/configuration.nix b/nixbld-etc-nixos/configuration.nix
index 3a981f15..5ec63745 100644
--- a/nixbld-etc-nixos/configuration.nix
+++ b/nixbld-etc-nixos/configuration.nix
@@ -298,6 +298,23 @@ in
           "216.218.133.2" "2001:470:600::2"       # slave.dns.he.net
         ];
       };
+      "193thz.com" = {
+        name = "193thz.com";
+        master = true;
+        file = "/etc/nixos/named/193thz.com";
+        extraConfig =
+           ''
+           dnssec-policy "default";
+           inline-signing yes;
+           notify explicit;
+           also-notify {
+             216.218.130.2;   # ns1.he.net
+           };
+           '';
+        slaves = [
+          "216.218.133.2" "2001:470:600::2"       # slave.dns.he.net
+        ];
+      };
       "200-29.98.206.103.in-addr.arpa" = {
         name = "200-29.98.206.103.in-addr.arpa";
         master = true;
@@ -975,6 +992,16 @@ in
         locations."/socket.io/".proxyPass = "http://localhost:9825";
         locations."/socket.io/".proxyWebsockets = true;
       };
+      "193thz.com" = {
+        addSSL = true;
+        enableACME = true;
+        root = "/var/www/perso/sb";
+      };
+      "www.193thz.com" = {
+        addSSL = true;
+        enableACME = true;
+        root = "/var/www/perso/sb";
+      };
       "nmigen.net" = {
         addSSL = true;
         enableACME = true;
@@ -1047,7 +1074,7 @@ in
     enable = true;
     localDnsResolver = false;  # conflicts with dnsmasq
     fqdn = "mail.m-labs.hk";
-    domains = [ "m-labs.hk" "m-labs.ph" ];
+    domains = [ "m-labs.hk" "m-labs.ph" "193thz.com" ];
     enablePop3 = true;
     enablePop3Ssl = true;
     certificateScheme = "acme-nginx";
diff --git a/nixbld-etc-nixos/named/193thz.com b/nixbld-etc-nixos/named/193thz.com
new file mode 100644
index 00000000..16d970f8
--- /dev/null
+++ b/nixbld-etc-nixos/named/193thz.com
@@ -0,0 +1,26 @@
+$TTL 7200
+
+@						SOA	ns1.193thz.com. sb.m-labs.hk. (
+							2023090504
+							7200
+							3600
+							86400
+							600)
+
+
+						NS		ns.193thz.com.
+						NS		ns1.he.net.
+
+						A		94.190.212.123
+						AAAA	2001:470:18:390::2
+						MX		10 mail.m-labs.hk.
+						TXT		"v=spf1 mx a:router.alt.m-labs.hk -all"
+						TXT		"google-site-verification=5eIjLyhM_siRg5Fc2Z3AMSbheH0JFOn5iR3TCEXakqU"
+
+
+ns						A		94.190.212.123
+
+mail._domainkey			TXT	"v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC9T0cONxGXeyETE0bJ6NJVGT58fVFrfb+WxQhMskCN/mJhODyDTkRCjzE8ZnKhZGjkFZNG+PoSZlW+kpSS1LvMwzQpMRaH4zAzIexffR0l7rJR1MuQiVMsfGWpO2SLEuN74L2qH8SUBHZjrRpeSaFxwQm+prIOzZe5wTZStt/6qQIDAQAB"
+_dmarc					TXT	"v=DMARC1; p=none"
+
+www						CNAME	@