--- title: "Changes to POST /v1/emails" method: POST path: "/v1/emails" --- # Changes to POST /v1/emails `POST /v1/emails` > Every recorded change to this operation, newest first. ## Timeline Changed in 11 of 27 revisions. - **2025-11-17** `d5dbb8522d58`: 1 info - **2025-09-28** `b78e8de12151`: 1 info - **2025-09-26** `f3f4be68abf8`: 3 breaking, 3 info - **2025-06-01** `80d7f1c84475`: 1 breaking, 2 info - **2025-05-25** `df13b10684f7`: 1 info - **2025-04-19** `078f534faefa`: 10 breaking, 6 info - **2025-03-08** `95336f26e872`: 3 info - **2024-08-21** `090b3a3f3e99`: 1 info - **2024-06-25** `c61ce1948029`: 4 breaking, 5 info - **2024-06-23** `8a412798ffaa`: 4 info - **2024-05-21** `ad91eadfd8ee`: 6 breaking, 8 warning, 5 info ## Changes - **2025-11-17** `d5dbb8522d58`: 1 info - added the new optional `header` request parameter `Idempotency-Key` - **2025-09-28** `b78e8de12151`: 1 info - added the new optional request property `headers` - **2025-09-26** `f3f4be68abf8`: 3 breaking, 3 info - removed `subschema #1, subschema #2` from the `bcc` request property `anyOf` list - removed `subschema #1, subschema #2` from the `cc` request property `anyOf` list - removed `subschema #1, subschema #2` from the `replyTo` request property `anyOf` list - added `subschema #1, subschema #2` to the `bcc` request property `anyOf` list - added `subschema #1, subschema #2` to the `cc` request property `anyOf` list - added `subschema #1, subschema #2` to the `replyTo` request property `anyOf` list - **2025-06-01** `80d7f1c84475`: 1 breaking, 2 info - removed `subschema #1, subschema #2` from the `to` request property `anyOf` list - added `subschema #1, subschema #2` to the `to` request property `anyOf` list - the `from` request property format was generalized from `email` to no format - **2025-05-25** `df13b10684f7`: 1 info - added the new optional request property `inReplyToId` - **2025-04-19** `078f534faefa`: 10 breaking, 6 info - removed `subschema #1, subschema #2` from the `bcc` request property `anyOf` list - removed `subschema #1, subschema #2` from the `cc` request property `anyOf` list - removed `subschema #1, subschema #2` from the `replyTo` request property `anyOf` list - removed `subschema #1, subschema #2` from the `to` request property `anyOf` list - the `attachments/items/content` request property's minLength was increased from `0` to `1` - the `attachments/items/filename` request property's minLength was increased from `0` to `1` - the `html` request property's minLength was increased from `0` to `1` - the `subject` request property's minLength was increased from `0` to `1` - the `text` request property's minLength was increased from `0` to `1` - the `from` request property format changed from no format to `email` - added `subschema #1, subschema #2` to the `bcc` request property `anyOf` list - added `subschema #1, subschema #2` to the `cc` request property `anyOf` list - added `subschema #1, subschema #2` to the `replyTo` request property `anyOf` list - added `subschema #1, subschema #2` to the `to` request property `anyOf` list - the request property `html` became nullable - the request property `text` became nullable - **2025-03-08** `95336f26e872`: 3 info - added the new optional request property `templateId` - added the new optional request property `variables` - the request property `subject` became optional - **2024-08-21** `090b3a3f3e99`: 1 info - added the new optional request property `scheduledAt` - **2024-06-25** `c61ce1948029`: 4 breaking, 5 info - removed `subschema #1, subschema #2` from the `bcc` request property `anyOf` list - removed `subschema #1, subschema #2` from the `cc` request property `anyOf` list - removed `subschema #1, subschema #2` from the `replyTo` request property `anyOf` list - removed `subschema #1, subschema #2` from the `to` request property `anyOf` list - added `subschema #1, subschema #2` to the `bcc` request property `anyOf` list - added `subschema #1, subschema #2` to the `cc` request property `anyOf` list - added `subschema #1, subschema #2` to the `replyTo` request property `anyOf` list - added `subschema #1, subschema #2` to the `to` request property `anyOf` list - the `from` request property format was generalized from `email` to no format - **2024-06-23** `8a412798ffaa`: 4 info - added the new optional request property `bcc` - added the new optional request property `cc` - request property `replyTo` list-of-types was widened by adding types `array` to media type `application/json` - request property `to` list-of-types was widened by adding types `array` to media type `application/json` - **2024-05-21** `ad91eadfd8ee`: 6 breaking, 8 warning, 5 info - the request property `html` became not nullable - the request property `text` became not nullable - the request property `subject` became required - request property `replyTo` list-of-types was narrowed by removing types `array` from media type `application/json` - request property `to` list-of-types was narrowed by removing types `array` from media type `application/json` - the `from` request property format changed from no format to `email` - deleted the `header` request parameter `Idempotency-Key` - removed the request property `bcc` - removed the request property `cc` - removed the request property `headers` - removed the request property `inReplyToId` - removed the request property `scheduledAt` - removed the request property `templateId` - removed the request property `variables` - the `attachments/items/content` request property's minLength was decreased from `1` to `0` - the `attachments/items/filename` request property's minLength was decreased from `1` to `0` - the `html` request property's minLength was decreased from `1` to `0` - the `subject` request property's minLength was decreased from `1` to `0` - the `text` request property's minLength was decreased from `1` to `0` --- [Operation](https://skmtc.dev/usesend/apis/usesend-api/docs/v1/emails/post.md) - [API](https://skmtc.dev/usesend/apis/usesend-api.md) - [Page](https://skmtc.dev/usesend/apis/usesend-api/changes/v1/emails/post)