---
title: "Changes to Send mail"
method: POST
path: "/me/sendMail"
---

# Changes to Send mail

`POST /me/sendMail`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 5 of 10 revisions.

- **2026-07-17** `af62694b9f2d`: 1 info
- **2026-05-28** `354d90657cdd`: 1 info
- **2026-05-28** `5c775c50414c`: 23 info
- **2026-05-28** `18fd0fdb8692`: 1 info
- **2026-05-28** `c6fc1d98f528`: 1 warning, 25 info

## Changes

- **2026-07-17** `af62694b9f2d`: 1 info
  - added the new optional request property `Message/allOf[subschema #2: message]/attachments/items/allOf[subschema #2: attachment]/contentBytes`
- **2026-05-28** `354d90657cdd`: 1 info
  - api operation id `me.sendMail` removed and replaced with `sendMail`
- **2026-05-28** `5c775c50414c`: 23 info
  - mapped value for discriminator key `#microsoft.graph.attachment` changed from `#/components/schemas/microsoft.graph.attachment` to `#/components/schemas/MicrosoftGraphAttachment` for `Message/allOf[#/components/schemas/MicrosoftGraphOutlookItem]/allOf[subschema #1: entity]/` request property
  - mapped value for discriminator key `#microsoft.graph.attachment` changed from `#/components/schemas/microsoft.graph.attachment` to `#/components/schemas/MicrosoftGraphAttachment` for `Message/allOf[subschema #2: message]/attachments/items/allOf[subschema #1: entity]/` request property
  - mapped value for discriminator key `#microsoft.graph.attachment` changed from `#/components/schemas/microsoft.graph.attachment` to `#/components/schemas/MicrosoftGraphAttachment` for `Message/allOf[subschema #2: message]/extensions/items/allOf[subschema #1: entity]/` request property
  - mapped value for discriminator key `#microsoft.graph.eventMessage` changed from `#/components/schemas/microsoft.graph.message` to `#/components/schemas/MicrosoftGraphMessage` for `Message/allOf[subschema #2: message]/` request property
  - mapped value for discriminator key `#microsoft.graph.fileAttachment` changed from `#/components/schemas/microsoft.graph.fileAttachment` to `#/components/schemas/MicrosoftGraphAttachment` for `Message/allOf[#/components/schemas/MicrosoftGraphOutlookItem]/allOf[subschema #1: entity]/` request property
  - mapped value for discriminator key `#microsoft.graph.fileAttachment` changed from `#/components/schemas/microsoft.graph.fileAttachment` to `#/components/schemas/MicrosoftGraphAttachment` for `Message/allOf[subschema #2: message]/attachments/items/allOf[subschema #1: entity]/` request property
  - mapped value for discriminator key `#microsoft.graph.fileAttachment` changed from `#/components/schemas/microsoft.graph.fileAttachment` to `#/components/schemas/MicrosoftGraphAttachment` for `Message/allOf[subschema #2: message]/attachments/items/allOf[subschema #2: attachment]/` request property
  - mapped value for discriminator key `#microsoft.graph.fileAttachment` changed from `#/components/schemas/microsoft.graph.fileAttachment` to `#/components/schemas/MicrosoftGraphAttachment` for `Message/allOf[subschema #2: message]/extensions/items/allOf[subschema #1: entity]/` request property
  - mapped value for discriminator key `#microsoft.graph.itemAttachment` changed from `#/components/schemas/microsoft.graph.attachment` to `#/components/schemas/MicrosoftGraphAttachment` for `Message/allOf[subschema #2: message]/attachments/items/allOf[subschema #2: attachment]/` request property
  - mapped value for discriminator key `#microsoft.graph.mailFolder` changed from `#/components/schemas/microsoft.graph.mailFolder` to `#/components/schemas/MicrosoftGraphMailFolder` for `Message/allOf[#/components/schemas/MicrosoftGraphOutlookItem]/allOf[subschema #1: entity]/` request property
  - mapped value for discriminator key `#microsoft.graph.mailFolder` changed from `#/components/schemas/microsoft.graph.mailFolder` to `#/components/schemas/MicrosoftGraphMailFolder` for `Message/allOf[subschema #2: message]/attachments/items/allOf[subschema #1: entity]/` request property
  - mapped value for discriminator key `#microsoft.graph.mailFolder` changed from `#/components/schemas/microsoft.graph.mailFolder` to `#/components/schemas/MicrosoftGraphMailFolder` for `Message/allOf[subschema #2: message]/extensions/items/allOf[subschema #1: entity]/` request property
  - mapped value for discriminator key `#microsoft.graph.mailSearchFolder` changed from `#/components/schemas/microsoft.graph.mailSearchFolder` to `#/components/schemas/MicrosoftGraphMailFolder` for `Message/allOf[#/components/schemas/MicrosoftGraphOutlookItem]/allOf[subschema #1: entity]/` request property
  - mapped value for discriminator key `#microsoft.graph.mailSearchFolder` changed from `#/components/schemas/microsoft.graph.mailSearchFolder` to `#/components/schemas/MicrosoftGraphMailFolder` for `Message/allOf[subschema #2: message]/attachments/items/allOf[subschema #1: entity]/` request property
  - mapped value for discriminator key `#microsoft.graph.mailSearchFolder` changed from `#/components/schemas/microsoft.graph.mailSearchFolder` to `#/components/schemas/MicrosoftGraphMailFolder` for `Message/allOf[subschema #2: message]/extensions/items/allOf[subschema #1: entity]/` request property
  - mapped value for discriminator key `#microsoft.graph.message` changed from `#/components/schemas/microsoft.graph.message` to `#/components/schemas/MicrosoftGraphMessage` for `Message/allOf[#/components/schemas/MicrosoftGraphOutlookItem]/allOf[subschema #1: entity]/` request property
  - mapped value for discriminator key `#microsoft.graph.message` changed from `#/components/schemas/microsoft.graph.message` to `#/components/schemas/MicrosoftGraphMessage` for `Message/allOf[#/components/schemas/MicrosoftGraphOutlookItem]/allOf[subschema #2: outlookItem]/` request property
  - mapped value for discriminator key `#microsoft.graph.message` changed from `#/components/schemas/microsoft.graph.message` to `#/components/schemas/MicrosoftGraphMessage` for `Message/allOf[subschema #2: message]/attachments/items/allOf[subschema #1: entity]/` request property
  - mapped value for discriminator key `#microsoft.graph.message` changed from `#/components/schemas/microsoft.graph.message` to `#/components/schemas/MicrosoftGraphMessage` for `Message/allOf[subschema #2: message]/extensions/items/allOf[subschema #1: entity]/` request property
  - mapped value for discriminator key `#microsoft.graph.outlookItem` changed from `#/components/schemas/microsoft.graph.outlookItem` to `#/components/schemas/MicrosoftGraphOutlookItem` for `Message/allOf[#/components/schemas/MicrosoftGraphOutlookItem]/allOf[subschema #1: entity]/` request property
  - mapped value for discriminator key `#microsoft.graph.outlookItem` changed from `#/components/schemas/microsoft.graph.outlookItem` to `#/components/schemas/MicrosoftGraphOutlookItem` for `Message/allOf[subschema #2: message]/attachments/items/allOf[subschema #1: entity]/` request property
  - mapped value for discriminator key `#microsoft.graph.outlookItem` changed from `#/components/schemas/microsoft.graph.outlookItem` to `#/components/schemas/MicrosoftGraphOutlookItem` for `Message/allOf[subschema #2: message]/extensions/items/allOf[subschema #1: entity]/` request property
  - mapped value for discriminator key `#microsoft.graph.referenceAttachment` changed from `#/components/schemas/microsoft.graph.attachment` to `#/components/schemas/MicrosoftGraphAttachment` for `Message/allOf[subschema #2: message]/attachments/items/allOf[subschema #2: attachment]/` request property
- **2026-05-28** `18fd0fdb8692`: 1 info
  - the `SaveToSentItems` request property default value changed from `false` to `true`
- **2026-05-28** `c6fc1d98f528`: 1 warning, 25 info
  - removed the request property `Message/allOf[subschema #2: message]/attachments/items/allOf[subschema #2: attachment]/contentBytes`
  - api operation id `sendMail` removed and replaced with `me.sendMail`
  - the `SaveToSentItems` request property default value changed from `true` to `false`
  - mapped value for discriminator key `#microsoft.graph.attachment` changed from `#/components/schemas/MicrosoftGraphAttachment` to `#/components/schemas/microsoft.graph.attachment` for `Message/allOf[#/components/schemas/MicrosoftGraphOutlookItem]/allOf[subschema #1: entity]/` request property
  - mapped value for discriminator key `#microsoft.graph.attachment` changed from `#/components/schemas/MicrosoftGraphAttachment` to `#/components/schemas/microsoft.graph.attachment` for `Message/allOf[subschema #2: message]/attachments/items/allOf[subschema #1: entity]/` request property
  - mapped value for discriminator key `#microsoft.graph.attachment` changed from `#/components/schemas/MicrosoftGraphAttachment` to `#/components/schemas/microsoft.graph.attachment` for `Message/allOf[subschema #2: message]/extensions/items/allOf[subschema #1: entity]/` request property
  - mapped value for discriminator key `#microsoft.graph.eventMessage` changed from `#/components/schemas/MicrosoftGraphMessage` to `#/components/schemas/microsoft.graph.message` for `Message/allOf[subschema #2: message]/` request property
  - mapped value for discriminator key `#microsoft.graph.fileAttachment` changed from `#/components/schemas/MicrosoftGraphAttachment` to `#/components/schemas/microsoft.graph.fileAttachment` for `Message/allOf[#/components/schemas/MicrosoftGraphOutlookItem]/allOf[subschema #1: entity]/` request property
  - mapped value for discriminator key `#microsoft.graph.fileAttachment` changed from `#/components/schemas/MicrosoftGraphAttachment` to `#/components/schemas/microsoft.graph.fileAttachment` for `Message/allOf[subschema #2: message]/attachments/items/allOf[subschema #1: entity]/` request property
  - mapped value for discriminator key `#microsoft.graph.fileAttachment` changed from `#/components/schemas/MicrosoftGraphAttachment` to `#/components/schemas/microsoft.graph.fileAttachment` for `Message/allOf[subschema #2: message]/attachments/items/allOf[subschema #2: attachment]/` request property
  - mapped value for discriminator key `#microsoft.graph.fileAttachment` changed from `#/components/schemas/MicrosoftGraphAttachment` to `#/components/schemas/microsoft.graph.fileAttachment` for `Message/allOf[subschema #2: message]/extensions/items/allOf[subschema #1: entity]/` request property
  - mapped value for discriminator key `#microsoft.graph.itemAttachment` changed from `#/components/schemas/MicrosoftGraphAttachment` to `#/components/schemas/microsoft.graph.attachment` for `Message/allOf[subschema #2: message]/attachments/items/allOf[subschema #2: attachment]/` request property
  - mapped value for discriminator key `#microsoft.graph.mailFolder` changed from `#/components/schemas/MicrosoftGraphMailFolder` to `#/components/schemas/microsoft.graph.mailFolder` for `Message/allOf[#/components/schemas/MicrosoftGraphOutlookItem]/allOf[subschema #1: entity]/` request property
  - mapped value for discriminator key `#microsoft.graph.mailFolder` changed from `#/components/schemas/MicrosoftGraphMailFolder` to `#/components/schemas/microsoft.graph.mailFolder` for `Message/allOf[subschema #2: message]/attachments/items/allOf[subschema #1: entity]/` request property
  - mapped value for discriminator key `#microsoft.graph.mailFolder` changed from `#/components/schemas/MicrosoftGraphMailFolder` to `#/components/schemas/microsoft.graph.mailFolder` for `Message/allOf[subschema #2: message]/extensions/items/allOf[subschema #1: entity]/` request property
  - mapped value for discriminator key `#microsoft.graph.mailSearchFolder` changed from `#/components/schemas/MicrosoftGraphMailFolder` to `#/components/schemas/microsoft.graph.mailSearchFolder` for `Message/allOf[#/components/schemas/MicrosoftGraphOutlookItem]/allOf[subschema #1: entity]/` request property
  - mapped value for discriminator key `#microsoft.graph.mailSearchFolder` changed from `#/components/schemas/MicrosoftGraphMailFolder` to `#/components/schemas/microsoft.graph.mailSearchFolder` for `Message/allOf[subschema #2: message]/attachments/items/allOf[subschema #1: entity]/` request property
  - mapped value for discriminator key `#microsoft.graph.mailSearchFolder` changed from `#/components/schemas/MicrosoftGraphMailFolder` to `#/components/schemas/microsoft.graph.mailSearchFolder` for `Message/allOf[subschema #2: message]/extensions/items/allOf[subschema #1: entity]/` request property
  - mapped value for discriminator key `#microsoft.graph.message` changed from `#/components/schemas/MicrosoftGraphMessage` to `#/components/schemas/microsoft.graph.message` for `Message/allOf[#/components/schemas/MicrosoftGraphOutlookItem]/allOf[subschema #1: entity]/` request property
  - mapped value for discriminator key `#microsoft.graph.message` changed from `#/components/schemas/MicrosoftGraphMessage` to `#/components/schemas/microsoft.graph.message` for `Message/allOf[#/components/schemas/MicrosoftGraphOutlookItem]/allOf[subschema #2: outlookItem]/` request property
  - mapped value for discriminator key `#microsoft.graph.message` changed from `#/components/schemas/MicrosoftGraphMessage` to `#/components/schemas/microsoft.graph.message` for `Message/allOf[subschema #2: message]/attachments/items/allOf[subschema #1: entity]/` request property
  - mapped value for discriminator key `#microsoft.graph.message` changed from `#/components/schemas/MicrosoftGraphMessage` to `#/components/schemas/microsoft.graph.message` for `Message/allOf[subschema #2: message]/extensions/items/allOf[subschema #1: entity]/` request property
  - mapped value for discriminator key `#microsoft.graph.outlookItem` changed from `#/components/schemas/MicrosoftGraphOutlookItem` to `#/components/schemas/microsoft.graph.outlookItem` for `Message/allOf[#/components/schemas/MicrosoftGraphOutlookItem]/allOf[subschema #1: entity]/` request property
  - mapped value for discriminator key `#microsoft.graph.outlookItem` changed from `#/components/schemas/MicrosoftGraphOutlookItem` to `#/components/schemas/microsoft.graph.outlookItem` for `Message/allOf[subschema #2: message]/attachments/items/allOf[subschema #1: entity]/` request property
  - mapped value for discriminator key `#microsoft.graph.outlookItem` changed from `#/components/schemas/MicrosoftGraphOutlookItem` to `#/components/schemas/microsoft.graph.outlookItem` for `Message/allOf[subschema #2: message]/extensions/items/allOf[subschema #1: entity]/` request property
  - mapped value for discriminator key `#microsoft.graph.referenceAttachment` changed from `#/components/schemas/MicrosoftGraphAttachment` to `#/components/schemas/microsoft.graph.attachment` for `Message/allOf[subschema #2: message]/attachments/items/allOf[subschema #2: attachment]/` request property

---

[Operation](https://skmtc.dev/ballerina-platform/apis/microsoft-graph-mail-api/docs/me/sendMail/post.md) - [API](https://skmtc.dev/ballerina-platform/apis/microsoft-graph-mail-api.md) - [Page](https://skmtc.dev/ballerina-platform/apis/microsoft-graph-mail-api/changes/me/sendMail/post)