diff --git a/services/mailu/scripts/vault-entrypoint.sh b/services/mailu/scripts/vault-entrypoint.sh
index 3d400680..9ba27c6a 100644
--- a/services/mailu/scripts/vault-entrypoint.sh
+++ b/services/mailu/scripts/vault-entrypoint.sh
@@ -42,6 +42,7 @@ if [ "${MAILU_POSTFIX_DISABLE_POSTLOG_UNIX_DGRAM:-}" = "true" ] || { [ -x /usr/s
 #!/bin/sh
 if [ "${1:-}" = "start-fg" ]; then
   /usr/sbin/postconf -MX postlog/unix-dgram 2>/dev/null || true
+  exec /usr/libexec/postfix/master -c /etc/postfix -d
 fi
 exec /usr/sbin/postfix "$@"
 EOF