diff --git a/postfixd.sh b/postfixd.sh
index 8af2776..93026e3 100755
--- a/postfixd.sh
+++ b/postfixd.sh
@@ -2,18 +2,17 @@
 
 case $1 in
   start)
-    if test -z "${RSPAMD}" ; then
-      echo "Missing rspamd hostname" >&2
-      exit 1
-    fi
-
     # Reconfigure postfix according to environment
     postconf -e myhostname="${DOMAIN}"
     postconf -e mydomain="${SUTTY}"
     postconf -e smtpd_tls_key_file="/etc/letsencrypt/live/${DOMAIN}/privkey.pem"
     postconf -e smtpd_tls_cert_file="/etc/letsencrypt/live/${DOMAIN}/fullchain.pem"
-    postconf -e smtpd_milters="${MILTERS}"
-    postconf -e non_smtpd_milters="${MILTERS}"
+
+    if test -n "${MILTERS}"; then
+      postconf -e smtpd_milters="${MILTERS}"
+      postconf -e non_smtpd_milters="${MILTERS}"
+    fi
+
     test -n "${NETWORKS}" && postconf -e mynetworks="${NETWORKS}"
 
     ;;