Properties
| Name | Type | Description |
|---|---|---|
| attachments | array | Attachments and inline images. |
| bcc | array | Hidden copied recipients. |
| cc | array | Visible copied recipients. |
| custom_headers | object | Custom X-* headers. Writes reject X-SES-TENANT, X-SES-CONFIGURATION-SET and X-SES-MESSAGE-TAGS case-insensitively. On updates, omit this field to preserve saved headers, or pass {} to clear them. |
| expected_revision | integer | The revision that was reviewed; a stale value returns conflict. |
| from | object | Authorised sender; defaults to this inbox. |
| html_body | string | HTML body, preserved when saved. |
| reply_to | array | Authorised reply addresses; defaults to this inbox. |
| subject | string | Subject; may be empty. |
| text_body | string | Plain-text body. |
| to | array | Primary recipients; at most 50 total across To, Cc and Bcc. |
JSON Schema
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"$id": "https://artifacts.apis.io/sendmux-ai/json-schema/sendmux-ai-update-mailbox-draft-schema.json",
"title": "UpdateMailboxDraft",
"x-generated": "2026-10-31",
"x-method": "derived",
"x-generator": "derive-json-schema.py",
"x-source": "openapi/openapi-app.json#/components/schemas/UpdateMailboxDraft",
"additionalProperties": false,
"properties": {
"attachments": {
"description": "Attachments and inline images.",
"items": {
"additionalProperties": false,
"properties": {
"blob_id": {
"description": "An attachment uploaded to this mailbox.",
"maxLength": 255,
"minLength": 1,
"type": "string"
},
"content_id": {
"description": "Content ID referenced by an inline image.",
"maxLength": 998,
"minLength": 1,
"type": "string"
},
"content_type": {
"description": "Attachment media type.",
"maxLength": 255,
"minLength": 1,
"type": "string"
},
"disposition": {
"description": "Whether the attachment appears within the message.",
"enum": [
"attachment",
"inline"
],
"type": "string"
},
"filename": {
"description": "Attachment filename.",
"maxLength": 255,
"minLength": 1,
"type": "string"
},
"size_bytes": {
"description": "Attachment size in bytes; verified when saved.",
"maximum": 7500000,
"minimum": 0,
"type": "integer"
}
},
"required": [
"blob_id",
"filename",
"content_type",
"size_bytes"
],
"type": "object"
},
"maxItems": 10,
"type": "array"
},
"bcc": {
"description": "Hidden copied recipients.",
"items": {
"additionalProperties": false,
"properties": {
"email": {
"description": "Email address.",
"format": "email",
"maxLength": 254,
"type": "string"
},
"name": {
"description": "Display name.",
"maxLength": 255,
"type": [
"string",
"null"
]
}
},
"required": [
"email"
],
"type": "object"
},
"maxItems": 50,
"type": "array"
},
"cc": {
"description": "Visible copied recipients.",
"items": {
"additionalProperties": false,
"properties": {
"email": {
"description": "Email address.",
"format": "email",
"maxLength": 254,
"type": "string"
},
"name": {
"description": "Display name.",
"maxLength": 255,
"type": [
"string",
"null"
]
}
},
"required": [
"email"
],
"type": "object"
},
"maxItems": 50,
"type": "array"
},
"custom_headers": {
"additionalProperties": {
"type": "string"
},
"description": "Custom X-* headers. Writes reject X-SES-TENANT, X-SES-CONFIGURATION-SET and X-SES-MESSAGE-TAGS case-insensitively. On updates, omit this field to preserve saved headers, or pass {} to clear them.",
"type": "object"
},
"expected_revision": {
"description": "The revision that was reviewed; a stale value returns conflict.",
"exclusiveMinimum": 0,
"type": "integer"
},
"from": {
"additionalProperties": false,
"description": "Authorised sender; defaults to this inbox.",
"properties": {
"email": {
"description": "Email address.",
"format": "email",
"maxLength": 254,
"type": "string"
},
"name": {
"description": "Display name.",
"maxLength": 255,
"type": [
"string",
"null"
]
}
},
"required": [
"email"
],
"type": "object"
},
"html_body": {
"description": "HTML body, preserved when saved.",
"maxLength": 1000000,
"type": "string"
},
"reply_to": {
"description": "Authorised reply addresses; defaults to this inbox.",
"items": {
"additionalProperties": false,
"properties": {
"email": {
"description": "Email address.",
"format": "email",
"maxLength": 254,
"type": "string"
},
"name": {
"description": "Display name.",
"maxLength": 255,
"type": [
"string",
"null"
]
}
},
"required": [
"email"
],
"type": "object"
},
"maxItems": 20,
"type": "array"
},
"subject": {
"description": "Subject; may be empty.",
"maxLength": 998,
"type": "string"
},
"text_body": {
"description": "Plain-text body.",
"maxLength": 1000000,
"type": "string"
},
"to": {
"description": "Primary recipients; at most 50 total across To, Cc and Bcc.",
"items": {
"additionalProperties": false,
"properties": {
"email": {
"description": "Email address.",
"format": "email",
"maxLength": 254,
"type": "string"
},
"name": {
"description": "Display name.",
"maxLength": 255,
"type": [
"string",
"null"
]
}
},
"required": [
"email"
],
"type": "object"
},
"maxItems": 50,
"type": "array"
}
},
"required": [
"expected_revision"
],
"type": "object"
}
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