---
title: "mail.message-summary@1 · OpenVibe.Services"
canonical: "https://openvibe.services/docs/contracts/mail.message-summary"
updated: null
---

# mail.message-summary@1 · OpenVibe.Services

HTML: [mail.message-summary@1 · OpenVibe.Services](https://openvibe.services/docs/contracts/mail.message-summary)

# MailMessageSummary `mail.message-summary@1`

Generated at 2026-11-13 06:25:48 UTC from [`openvibe-contracts v0.419.0`](https://github.com/OpenVibers/OpenVibe.Contracts/tree/v0.419.0) and [`openvibe-sdk v0.161.0`](https://github.com/OpenVibers/OpenVibe.SDK/tree/v0.161.0).

- Version: 1.0.0
- Owner: mail
- Visibility: first-party
- Status: active
- Compatibility: backward
- Schema: [`https://openvibe.network/contracts/mail/message-summary.v1.json`](/docs/contracts/mail.message-summary.json)

One message in a mask, burner or agent inbox, as OpenVibe.Mail's list API returns it: the id, the senders, the subject and the time. It deliberately has no preview and no body: a message body is read only by the verification-code endpoint, in memory, and is never part of a list, an event or a database row. additionalProperties is false so a field like body, preview or html fails the contract rather than leaking into an API.

## Fields

| Field | Type | Required | Description | Constraints |
| --- | --- | --- | --- | --- |
| `id` | string | yes | The mail server's message id (a JMAP Email id). Opaque outside OpenVibe.Mail. | - `minLength 1`<br>- `maxLength 512` |
| `from` | array of string | yes | The sender addresses, as the mail server parsed them. An address list, not a display name. | - `maxItems 100`<br>- `items: format email`<br>- `items: maxLength 254` |
| `subject` | string \| null | yes | The subject line, or null when the message had none. | - `maxLength 2000` |
| `received_at` | string \| null | yes | When the mail server received the message, ISO 8601 UTC, or null when it did not record a time. | - `format date-time` |

## Examples

From the contract's own test fixtures: valid ones validate, rejected ones must fail.

 Valid: one

~~~~
{
  "id": "maaaaad",
  "from": [
    "sender@example.net"
  ],
  "subject": "Your verification code",
  "received_at": "2026-11-07T12:00:00Z"
}
~~~~

Rejected: carries-body

~~~~
{
  "id": "maaaaad",
  "from": [
    "sender@example.net"
  ],
  "subject": "Your verification code",
  "received_at": "2026-11-07T12:00:00Z",
  "body": "Your verification code is 918273"
}
~~~~

## Validate

~~~~
const contracts = require('openvibe-contracts');
contracts.validate('mail.message-summary@1', value);   // { valid, errors: [{ path, message }] }
~~~~