[Yandex Cloud documentation](../../index.md) > [Yandex Cloud Postbox](../index.md) > [Concepts](index.md) > Quotas and limits

# Quotas and limits in Yandex Cloud Postbox

Yandex Cloud Postbox has the following limitations:

* [_Quotas_](https://console.yandex.cloud/cloud?section=quotas) are organizational constraints that can be changed by contacting technical support.
* _Limits_ are technical constraints of the Yandex Cloud architecture. You cannot change the limits.

If you need more resources, you can increase your quotas in one of the following ways:

* [Make a request to increase your quotas](https://console.yandex.cloud/cloud?section=quotas).
* Contact [support](https://center.yandex.cloud/support) and specify which quotas you want increased and by how much.

To have your request processed, you must have the `quota-manager.requestOperator` [role](../../iam/roles-reference.md#quota-manager-requestoperator) or higher, e.g., `editor` or `admin`.

You can manage your quotas with [Cloud Quota Manager](../../quota-manager/quickstart.md).

#### Quotas {#postbox-quotas}

#|
|| Type of limit | Value ||
|| Maximum number of recipients per email
`postbox.recipients_per_email.count` | 50 ||
|| Maximum size of an email with attachments 
`postbox.email.size` | 10 MB ||
|| Maximum number of addresses 
`postbox.identities.count` | 10 ||
|| Maximum email send rate 
`postbox.send.rate` | 1 email per second ||
|| Maximum number of emails that can be sent within a 24-hour time interval 
`postbox.emails_sent.count` | 200 ||
|| Maximum number of [configurations](glossary.md#configuration) 
`postbox.configuration_sets.count` | 5 ||
|#