Postbox
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Updated at August 18, 2026
Note
Currently, there are two UIs that support Workflows: Yandex Cloud and Yandex AI Studio. In this case, the following applies:
- Workflows created in the Yandex Cloud UI are automatically available in the AI Studio UI.
- Workflows created in the AI Studio UI are not available in the Yandex Cloud UI.
Starting September 3, 2026, Workflows will no longer be supported in the Yandex Cloud UI. To create and manage workflows, use the AI Studio UI.
Sending emails with Yandex Cloud Postbox. The simple and raw fields are mutually exclusive.
| Field name | Type | Required | Default value | Templating supported | Description |
|---|---|---|---|---|---|
fromAddress |
string |
Yes | None | None | Yandex Cloud Postbox address to send emails from. The service account specified in the workflow settings and the address specified in this field must reside in the same folder. |
destination |
Destination | Yes | None | None | Object describing addresses of recipients. |
simple |
SimpleMessage | None | None | None | Email that will be sent. |
raw |
RawMessage | None | None | None | Email that will be sent. |
Destination
After templating, the field values must have this format: a@example.com, b@example.com or [a@example.com, b@example.com].
| Field name | Type | Required | Default value | Templating supported | Description |
|---|---|---|---|---|---|
toAddresses |
string |
Yes | None | Yes | Addresses of email recipients. |
ccAdresses |
string |
None | None | Yes | Addresses of email copy recipients. |
RawMessage
| Field name | Type | Required | Default value | Templating supported | Description |
|---|---|---|---|---|---|
data |
string |
Yes | None | Yes | Raw email type. For more information, see this Yandex Cloud Postbox guide. |
SimpleMessage
| Field name | Type | Required | Default value | Templating supported | Description |
|---|---|---|---|---|---|
subject |
MessageData | Yes | None | None | Email subject. |
body |
Body | Yes | None | None | Email text. |
Body
| Field name | Type | Required | Default value | Templating supported | Description |
|---|---|---|---|---|---|
text |
MessageData | Yes | None | None | Object in charge of displaying the email in mail clients without HTML support. |
html |
MessageData | Yes | None | None | Object in charge of displaying the email in mail clients with HTML support. |
MessageData
| Field name | Type | Required | Default value | Templating supported | Description |
|---|---|---|---|---|---|
data |
string |
Yes | None | Yes | Text. |
charset |
UTF_8|ISO_8859_1|Shift_JIS |
Yes | None | None | Encoding: |