# IMQOptions.safeDelivery property · @imqueue/core

Source: https://imqueue.org/api/core/latest/core.imqoptions.safedelivery/
Published: 2026-08-04
Author: @imqueue maintainers (https://github.com/imqueue)
Package: @imqueue/core 3.3.2 — generated reference, not hand-written

Enable guaranteed message delivery. When enabled, reading a message moves it atomically out of the queue into a worker-owned key instead of popping it outright, so a worker that dies before it even starts on a message leaves that message behind for the watcher to re-queue rather than taking it down with the process.

The guarantee covers that hand-off, not the processing. The worker key is released as soon as the message is dispatched to the `message` listener, so a worker killed while its handler is still running loses that message exactly as it would with safe delivery off — draining in-flight work before exit is up to the application. Delivery is at-least-once in either mode, so handlers should be idempotent.

**Signature:**

```typescript
safeDelivery?: boolean;
```

## Default Value

false