--- title: "Changes to Create a batch of email messages" method: POST path: "/email_messages/batch" --- # Changes to Create a batch of email messages `POST /email_messages/batch` > Every recorded change to this endpoint, newest first. ## Timeline Changed in 7 of 61 revisions. - **2026-07-29** `14417f208717` — 1 breaking, 1 warning - **2026-07-28** `b1bf96d8391e` — 2 breaking, 6 warning, 22 info - **2026-07-16** `2fb3b617430a` — 12 warning, 6 info - **2026-07-14** `021f0faf96df` — 1 breaking, 1 warning - **2026-07-12** `b3c5aebde44c` — 2 breaking, 5 warning, 5 info - **2026-07-07** `6ef0ae248bf7` — 1 info - **2026-07-02** `224ed0d8a5c3` — 1 breaking ## Changes - **2026-07-29** `14417f208717` — 1 breaking, 1 warning - removed the success response with the status `202` - the optional response header `Idempotent-Replayed` removed for the status `207` - **2026-07-28** `b1bf96d8391e` — 2 breaking, 6 warning, 22 info - removed the required property `data/items/inserted_at` from the response with the `202` status - removed the required property `data/items/inserted_at` from the response with the `207` status - removed the optional property `data/items/send_at` from the response with the `202` status - removed the optional property `data/items/send_at` from the response with the `207` status - removed the optional property `data/items/suppressed` from the response with the `202` status - removed the optional property `data/items/suppressed` from the response with the `207` status - added the new `daily_limit_exceeded` enum value to the `data/items/events/items/type` response property for the response status `202` - added the new `daily_limit_exceeded` enum value to the `data/items/events/items/type` response property for the response status `207` - added the new optional request property `messages/items/attachments/items/content_id` - added the new optional request property `messages/items/attachments/items/disposition` - added the new optional request property `messages/items/scheduled_at` - added the new optional request property `messages/items/tracking_settings` - the request property `messages/items/group_id` became nullable - request property `messages/items/send_at` deprecated - added the optional property `data/items/recipient_statuses` to the response with the `202` status - added the optional property `data/items/recipient_statuses` to the response with the `207` status - added the optional property `data/items/scheduled_at` to the response with the `202` status - added the optional property `data/items/scheduled_at` to the response with the `207` status - added the required property `data/items/attachments/items/content_id` to the response with the `202` status - added the required property `data/items/attachments/items/content_id` to the response with the `207` status - added the required property `data/items/attachments/items/disposition` to the response with the `202` status - added the required property `data/items/attachments/items/disposition` to the response with the `207` status - added the required property `data/items/attachments/items/sha256` to the response with the `202` status - added the required property `data/items/attachments/items/sha256` to the response with the `207` status - added the required property `data/items/attachments/items/size_bytes` to the response with the `202` status - added the required property `data/items/attachments/items/size_bytes` to the response with the `207` status - added the required property `data/items/attachments/items/url` to the response with the `202` status - added the required property `data/items/attachments/items/url` to the response with the `207` status - added the required property `data/items/created_at` to the response with the `202` status - added the required property `data/items/created_at` to the response with the `207` status - **2026-07-16** `2fb3b617430a` — 12 warning, 6 info - added the new `recipient_suppressed` enum value to the `errors/items/code` response property for the response status `400` - added the new `recipient_suppressed` enum value to the `errors/items/code` response property for the response status `401` - added the new `recipient_suppressed` enum value to the `errors/items/code` response property for the response status `409` - added the new `recipient_suppressed` enum value to the `errors/items/code` response property for the response status `413` - added the new `recipient_suppressed` enum value to the `errors/items/code` response property for the response status `422` - added the new `recipient_suppressed` enum value to the `errors/items/code` response property for the response status `503` - added the new `reputation_suspended` enum value to the `errors/items/code` response property for the response status `400` - added the new `reputation_suspended` enum value to the `errors/items/code` response property for the response status `401` - added the new `reputation_suspended` enum value to the `errors/items/code` response property for the response status `409` - added the new `reputation_suspended` enum value to the `errors/items/code` response property for the response status `413` - added the new `reputation_suspended` enum value to the `errors/items/code` response property for the response status `422` - added the new `reputation_suspended` enum value to the `errors/items/code` response property for the response status `503` - added the optional property `suppressed` to the response with the `400` status - added the optional property `suppressed` to the response with the `401` status - added the optional property `suppressed` to the response with the `409` status - added the optional property `suppressed` to the response with the `413` status - added the optional property `suppressed` to the response with the `422` status - added the optional property `suppressed` to the response with the `503` status - **2026-07-14** `021f0faf96df` — 1 breaking, 1 warning - for the `header` request parameter `Idempotency-Key`, the maxLength was decreased from `512` to `255` - changed the pattern of the `header` request parameter `Idempotency-Key` from `^(?:[A-Za-z0-9_-]{1,255}|"(?:[\x20-\x21\x23-\x5B\x5D-\x7E]|\\["\\]){1,255}")$` to `^[A-Za-z0-9_-]{1,255}$` - **2026-07-12** `b3c5aebde44c` — 2 breaking, 5 warning, 5 info - removed the required property `data/items/idempotency_key` from the response with the `202` status - removed the required property `data/items/idempotency_key` from the response with the `207` status - removed the request property `messages/items/idempotency_key` - added the new `10027` enum value to the `errors/items/code` response property for the response status `400` - added the new `10027` enum value to the `errors/items/code` response property for the response status `401` - added the new `10036` enum value to the `errors/items/code` response property for the response status `400` - added the new `10036` enum value to the `errors/items/code` response property for the response status `401` - added the new optional `header` request parameter `Idempotency-Key` - added the non-success response with the status `409` - added the non-success response with the status `413` - added the non-success response with the status `422` - added the non-success response with the status `503` - **2026-07-07** `6ef0ae248bf7` — 1 info - endpoint added - **2026-07-02** `224ed0d8a5c3` — 1 breaking - api path removed without deprecation --- [Operation](https://skmtc.dev/team-telnyx/apis/telnyx-api-2/docs/email_messages/batch/post.md) · [API](https://skmtc.dev/team-telnyx/apis/telnyx-api-2.md) · [Page](https://skmtc.dev/team-telnyx/apis/telnyx-api-2/changes/email_messages/batch/post)