diff --git a/create_master_zone_file.sh b/create_master_zone_file.sh
index 2a2b80f..4e31927 100755
--- a/create_master_zone_file.sh
+++ b/create_master_zone_file.sh
@@ -740,7 +740,12 @@ EOF
 ;
 ; TXT (u.a. SPF)
 ;
-@               3600 IN TXT   "v=spf1 a mx ~all"
+@               3600 IN TXT   "v=spf1 a mx mx:lists.warenform.de mx mx:lists.oopen.de mx:lists.initiativenserver.de mx:listi.jpberlin.de ~all"
+
+;
+; DMARC
+;
+_dmarc               IN TXT   "v=DMARC1; p=reject;"
 EOF
 elif [[ -n "${DEFAULT_MX_HOST_1}" ]] ; then
    cat << EOF >> "${ZONE_FILE_MASTER_DIR}/${DOMAIN}.zone"