diff --git a/services/mailu/scripts/vault-entrypoint.sh b/services/mailu/scripts/vault-entrypoint.sh
index 924f05aa..3d400680 100644
--- a/services/mailu/scripts/vault-entrypoint.sh
+++ b/services/mailu/scripts/vault-entrypoint.sh
@@ -36,7 +36,7 @@ if [ -d /app/venv/bin ]; then
   export PATH
 fi
 
-if [ "${MAILU_POSTFIX_DISABLE_POSTLOG_UNIX_DGRAM:-}" = "true" ]; then
+if [ "${MAILU_POSTFIX_DISABLE_POSTLOG_UNIX_DGRAM:-}" = "true" ] || { [ -x /usr/sbin/postfix ] && [ -x /usr/sbin/postconf ]; }; then
   mkdir -p /tmp/mailu-wrapper-bin
   cat > /tmp/mailu-wrapper-bin/postfix <<'EOF'
 #!/bin/sh