> ## Documentation Index > Fetch the complete documentation index at: https://sendmux.ai/docs/llms.txt > Use this file to discover all available pages before exploring further. # Download the original message > Downloads the stored message as an .eml file, including its original headers, body and attachments. Requires access to the selected inbox. Supports conditional requests with If-None-Match. ## OpenAPI ````yaml /openapi-app.json get /mailbox/messages/{message_id}/raw openapi: 3.1.0 info: description: Programmatic access to your Sendmux email infrastructure. title: Sendmux API version: 1.0.0 servers: - description: API v1 url: https://app.sendmux.ai/api/v1 security: - bearerAuth: [] - oauth2: [] paths: /mailbox/messages/{message_id}/raw: get: tags: - Mailbox API summary: Download the original message description: >- Downloads the stored message as an .eml file, including its original headers, body and attachments. Requires access to the selected inbox. Supports conditional requests with If-None-Match. operationId: mailboxDownloadRawMessage parameters: - in: path name: message_id required: true schema: description: Message ID. type: string - in: header name: If-None-Match required: false schema: description: Weak ETag from a previous response. Returns 304 when unchanged. type: string - description: >- Mailbox public ID to target when the credential grants access to more than one mailbox. Omit when the credential is scoped to exactly one mailbox. in: query name: mailbox_id required: false schema: type: string responses: '200': content: message/rfc822: schema: format: binary type: string description: Original message file headers: Content-Disposition: description: Attachment filename. schema: type: string Content-Length: description: Size of the stored message in bytes. schema: type: string ETag: description: Validator for the stored message. schema: type: string '304': description: Not modified '401': content: application/json: schema: $ref: '#/components/schemas/ApiError' description: Authentication required '403': content: application/json: schema: $ref: '#/components/schemas/ApiError' description: Mailbox read permission required '404': content: application/json: schema: $ref: '#/components/schemas/ApiError' description: Message not found '429': content: application/json: schema: $ref: '#/components/schemas/ApiError' description: Rate limit exceeded '500': content: application/json: schema: $ref: '#/components/schemas/ApiError' description: Unexpected error '503': content: application/json: schema: $ref: '#/components/schemas/ApiError' description: Message download unavailable security: - bearerAuth: [] - oauth2: - mailbox.read components: schemas: ApiError: additionalProperties: false properties: error: additionalProperties: false properties: code: description: Machine-readable error code enum: - invalid_parameter - missing_parameter - authentication_required - insufficient_permissions - not_found - conflict - limit_exceeded - idempotency_conflict - payload_too_large - validation_error - rate_limit_exceeded - service_unavailable - internal_error example: invalid_parameter type: string doc_url: description: Link to relevant documentation type: string errors: description: >- Accumulated per-field issues for validation errors. Only present on 400/422 responses. items: $ref: '#/components/schemas/ApiErrorDetail' type: array message: description: Human-readable error description type: string param: description: The parameter that caused the error type: string retryable: description: >- Whether the caller may safely retry this request. 4xx are typically false (except 429); 5xx are typically true. example: false type: boolean required: - code - message - retryable type: object meta: additionalProperties: false properties: request_id: example: req_clxxxxxxxxxxxxxxxxxxxxxxxxx type: string required: - request_id type: object ok: enum: - false type: boolean required: - ok - error - meta type: object ApiErrorDetail: additionalProperties: false properties: code: description: >- Machine-readable issue code from the validator (e.g. zod issue code). example: invalid_string type: string field: description: Dot-path of the offending request field. example: recipient.email type: string message: description: Human-readable issue description. type: string required: - field - code - message type: object securitySchemes: bearerAuth: bearerFormat: API Key description: >- Sendmux API key. Use a root API key for Management API routes, or a mailbox credential for Mailbox API routes. Obtain keys from the dashboard under API Keys. scheme: bearer type: http oauth2: description: >- Use the authorisation-code flow with S256 PKCE and resource=https://sendmux.ai/api. The user selects the team, API access and mailboxes during consent. OAuth access tokens authenticate HTTP API requests; use separate credentials for SMTP and IMAP. flows: authorizationCode: authorizationUrl: https://app.sendmux.ai/oauth/authorize refreshUrl: https://app.sendmux.ai/oauth/token scopes: analytics.*: All analytics operations analytics.read: View key usage analytics and verification logs billing.*: All billing operations billing.auto_topup: Configure auto top-up settings billing.read: View balance, transactions, invoices billing.topup: Purchase balance top-ups domain.*: All domain operations domain.create: Add sending domains domain.delete: Remove domains domain.read: List/view domains and DNS status domain.verify: Trigger domain verification email.receive: Authorise email reception email.send: Send email through the HTTP API key.*: All key management operations key.create: Create new API keys (both root and mailbox) key.read: List/view API keys and their metadata key.revoke: Revoke API keys key.rotate: Rotate API keys logs.*: All log operations logs.read: View delivery logs mailbox.admin.*: All mailbox admin operations mailbox.admin.create: Create mailboxes (admin-level) mailbox.admin.delete: Delete mailboxes (admin-level) mailbox.admin.manage: Manage all mailbox settings mailbox.admin.read: List/view mailboxes (admin-level) mailbox.drafts.write: Create and edit saved mailbox drafts mailbox.read: Read mailbox contents (folders, messages) mailbox.settings.update: Update own mailbox settings (signature, auto-reply) provider.*: All provider operations provider.create: Add email provider accounts (Google, Microsoft, SMTP) provider.delete: Remove provider accounts provider.read: List/view provider accounts and connection status provider.update: Update provider settings, refresh tokens routing.*: All routing operations routing.create: Create delivery groups routing.delete: Remove delivery groups routing.read: List/view delivery groups and routing rules routing.update: Update delivery group configuration team.*: All team operations team.members.invite: Invite team members team.members.remove: Remove team members team.members.roles: Change member roles team.read: View team settings and members team.update: Update team settings webhook.*: All webhook operations webhook.create: Create webhook subscriptions webhook.delete: Delete webhook subscriptions webhook.manage: Rotate signing secret + send test events webhook.read: List/view webhook subscriptions webhook.update: Update webhook URL, event types, enabled flag tokenUrl: https://app.sendmux.ai/oauth/token type: oauth2 ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.