diff --git a/ch-wirth.ch.zone b/ch-wirth.ch.zone
index 559099f..c9cab91 100644
--- a/ch-wirth.ch.zone
+++ b/ch-wirth.ch.zone
@@ -2,7 +2,7 @@ $TTL 4h
 $ORIGIN ch-wirth.ch.
 
 @  1D  IN	 SOA ns1.nbit.ch. hostmaster.nbit.ch. (
-			      2021080502 ; serial
+			      2023090802 ; serial
 			      3H ; refresh
 			      120; retry
 			      2w ; expire
@@ -15,6 +15,15 @@ $ORIGIN ch-wirth.ch.
        IN  MX  10 mail.ch-wirth.ch. ; Mail Exchange Fallback
        IN  A      135.181.95.247
 
+       IN  TXT "v=spf1 ip4:213.200.229.13 -all"
+
+
 ; server host definitions
 mail   IN  A      135.181.95.247
 ns1    IN  A      213.200.229.182
+
+202308._domainkey	IN	TXT	( "v=DKIM1; h=sha256; k=rsa; s=email; "
+	  "p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAxrMRWRrRKl4vOxppaaZx7AzQpACMQrMFHdvzbxFH9Do36mag8ecihB3tPtMEBkoyB9ipZQlSA1t2rD1qMseG1UnFKnX2FcrvLjiQUQ/LIJYXGCjUnRO7uRvOpJHAF33tuG3D2WzxMpk1zTJ08i8lI/gKDQxKOZJR6X4gMNunlGgiaLq6q+tcjZrPN9jjtdGI9SANTQ+w2Zm72W"
+	  "BEjp4UdGcZtMejaxu/GV8Vem3xdvbP8pCbVP10HE5NhCNsA0sG5XiyfF6x5Hf5hEMgx3ZbN19cj+tUZ/HvQRScAjr1tRH0oDafuDtvEbDFyUSBqKe7U4URTAUEVUHqUxDqKQDtJwIDAQAB" )  ; ----- DKIM key 202308 for ch-wirth.ch
+
+_dmarc IN  TXT "v=DMARC1;p=reject;pct=100"