> ## Documentation Index
> Fetch the complete documentation index at: https://docs.mailofly.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Email addresses for testing

> Special mailbox addresses for testing delivery, hard bounces, soft bounces, and spam complaints.

# Email Addresses for Testing

To test your application's error handling, bounce webhooks, and retry logic without sending spam to real people, Mailofly provides simulated test addresses.

***

## Simulated Recipient Addresses

When you send to these addresses in sandbox mode or using an active API key, Mailofly simulates specific delivery responses without dispatching external SMTP traffic:

| Recipient Address         | Simulated Result                                           | Webhook Event Triggered  |
| :------------------------ | :--------------------------------------------------------- | :----------------------- |
| `delivered@mailofly.dev`  | Simulates successful delivery (`250 OK`)                   | `email.delivered`        |
| `bounced@mailofly.dev`    | Simulates permanent hard bounce (`550 5.1.1 User unknown`) | `email.bounced`          |
| `softbounce@mailofly.dev` | Simulates temporary mailbox full (`452 4.2.2`)             | `email.delivery_delayed` |
| `complained@mailofly.dev` | Simulates recipient clicking "Report Spam"                 | `email.complained`       |

***

## Testing Suppressions

Sending to `bounced@mailofly.dev` or `complained@mailofly.dev` automatically adds the address to your test workspace suppression list, allowing you to test:

* Webhook signature verification and payload handling
* Your database marking the user profile as un-deliverable
* UI banners warning users about bounced emails


## Related topics

- [Send Test Emails](/sending/send-test-emails.md)
- [Creating email address](/guides/sending/creating-email-address.md)
- [Change your Email Address](/guides/account/change-email-address.md)
- [E2E testing with Playwright](/guides/testing/playwright-testing.md)
- [mailofly.dev Domain Error](/guides/domains/mailofly-dev-domain-error.md)