[Yandex Cloud documentation](../../index.md) > [Yandex Cloud Postbox](../index.md) > [Concepts](index.md) > Email delivery simulator

# Email delivery simulator

The email delivery simulator is a set of special Yandex Cloud Postbox addresses that simulate different email delivery outcomes.

You can email to the simulator address using any method supported by Yandex Cloud Postbox: SMTP or an [AWS-compatible API](../aws-compatible-api/index.md).

## Available addresses {#scenarios}

#|
|| **Address** | **Scenario** | **Description** ||
|| `success@simulator.pstbx.ru` | Successful delivery | Yandex Cloud Postbox accepts the email as delivered. ||
|| `bounce@simulator.pstbx.ru` | Delivery error | The simulator's mail server returns the `452 4.2.2 The recipient's inbox is out of storage space` SMTP response. ||
|| `delay@simulator.pstbx.ru` | Delivery delayed | Yandex Cloud Postbox fails to deliver the email due to a temporary error, sends a [delivery delayed notification](notification.md#delayed-delivery), and retries delivery. ||
|| `suppressed@simulator.pstbx.ru` | Recipient on suppression list | Yandex Cloud Postbox does not attempt to deliver the email and sends a [delivery error notification](notification.md#bounce) with the `Suppressed` subtype, as if the recipient address were on the suppression list. ||
|#

## How to use {#usage}

1. Get ready to send an email using one of the methods described in [Sending an email](../operations/send-email.md).
1. Specify the simulator address for your preferred scenario as a recipient.
1. Send an email.
1. Check the result:
   * In [email operation notifications](notification.md) if your email [uses](configuration.md#usage) a subscription configuration.
   * In the [statistics](statistics.md).
   * In the [execution log](../operations/logs-write.md) if transitions between email statuses are logged for the address.
   * In [sent history](../operations/messages.md).

#### Useful links {#see-also}

* [Sending an email](../operations/send-email.md)
* [Email event notifications](notification.md)
* [Statistics](statistics.md)
* [Writing to the execution log in Yandex Cloud Postbox](../operations/logs-write.md)
* [Viewing information about sent emails](../operations/messages.md)