You got **Sustained permanent bounce rate is above 2%** or **above 5%**. Permanent bounces stayed at that share of **sent** mail across consecutive windows with enough volume. Low-volume days stay neutral and do not create this alert.

5% is an error. 2% is a warning. Both mean the list has addresses that do not exist (or reject the mailbox).

This is not inbox placement. It is hard failures after send.

## What to change

1. Open **Settings → Deliverability** and confirm the bounce windows.
2. Stop the next campaign/workflow send to the same dirty list.
3. Remove or suppress permanent-bounce addresses. Lumail already suppresses them after a permanent bounce — do not re-import them.
4. For the next send, exclude:
   - role accounts you never confirmed (`info@`, `admin@`) if they bounce
   - old exported lists
   - purchased or scraped addresses
5. Prefer confirmed opt-in for new subscribers.

If you imported a CSV, run a small verified segment first. Do not “clean” by blasting the whole file.

## What does not fix it

- Changing DKIM/DMARC. Auth issues are separate alerts.
- Sending more mail to dilute the rate. That makes enforcement worse.

## After it recovers

The alert resolves only after consecutive adequate windows stay **below** 2%. One good day is not enough.

## Related

- [How to lower complaint rate](/docs/deliverability/how-to-lower-complaint-rate)
- [Sender Health](/docs/features/sender-health)
- [Account Verification](/docs/features/account-verification)