mailu: fix postfix startup on rwx queue

services/mailu/helmrelease.yaml

@@ -537,6 +537,8 @@ spec:
                             $patch: delete
                           - name: VAULT_ENV_FILE
                             value: /vault/secrets/mailu-env.sh
+                          - name: MAILU_POSTFIX_DISABLE_POSTLOG_UNIX_DGRAM
+                            value: "true"
                         volumeMounts:
                           - name: mailu-vault-entrypoint
                             mountPath: /entrypoint.sh

services/mailu/scripts/vault-entrypoint.sh

@@ -31,4 +31,23 @@ if [ -n "${VAULT_COPY_FILES:-}" ]; then
   IFS="$old_ifs"
 fi
 
+if [ -d /app/venv/bin ]; then
+  PATH="/app/venv/bin:$PATH"
+  export PATH
+fi
+
+if [ "${MAILU_POSTFIX_DISABLE_POSTLOG_UNIX_DGRAM:-}" = "true" ]; then
+  mkdir -p /tmp/mailu-wrapper-bin
+  cat > /tmp/mailu-wrapper-bin/postfix <<'EOF'
+#!/bin/sh
+if [ "${1:-}" = "start-fg" ]; then
+  /usr/sbin/postconf -MX postlog/unix-dgram 2>/dev/null || true
+fi
+exec /usr/sbin/postfix "$@"
+EOF
+  chmod 0755 /tmp/mailu-wrapper-bin/postfix
+  PATH="/tmp/mailu-wrapper-bin:$PATH"
+  export PATH
+fi
+
 exec "$@"