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Draft changelog: September 2026 mail replyTo #407

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mintlify merged 1 commit into from
Sep 14, 2026
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Draft changelog: September 2026 mail replyTo #407

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14 changes: 14 additions & 0 deletions mintlify/docs/changelog/september-2026.mdx
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---
title: September 2026
description: What's new in urBackend — new features, improvements, and fixes.
---

<Update label="2026-09-14" description="Week of 2026-09-08–2026-09-14" tags={["Feature", "Fix"]}>
## New features

- **`replyTo` on transactional mail** — `POST /mail/send` and `POST /mail/send/batch` now accept an optional `replyTo` field (a single address or an array of addresses). When set, replies from recipients route to those addresses instead of your verified `from` sender. Available in the REST API, TypeScript SDK (`mail.send()` / `mail.sendBatch()`), and Python SDK. See [Send mail](/api-reference/mail/send) and [Mail SDK](/sdk/mail). (by [@yash-pouranik](https://github.com/yash-pouranik) in [#402](https://github.com/geturbackend/urbackend/pull/402))

## Bug fixes

- **Empty mail bodies are now rejected up-front** — Mail requests without any content (both `html` and `text` empty or whitespace) now fail validation with a `400` before hitting the mail queue, instead of enqueuing an empty message. Whitespace-only subjects are also rejected. See [Send mail](/api-reference/mail/send). (by [@yash-pouranik](https://github.com/yash-pouranik) in [#402](https://github.com/geturbackend/urbackend/pull/402))
</Update>
1 change: 1 addition & 0 deletions mintlify/docs/docs.json
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{
"group": "Changelog",
"pages": [
"changelog/september-2026",
"changelog/august-2026",
"changelog/july-2026",
"changelog/june-2026",
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