[SIMI-172] Resend: Define all assets for initial release (DataDog#21940)

* Resend: no-assets, define label

* Update labeler.yml with resend

* Resend: All assets for initial release

* Update labeler.yml with resend

* Resend: All assets for initial release, config fixes

* Resend: Update CODEOWNERS

Author: bskinny

.github/CODEOWNERS

@@ -410,6 +410,11 @@ datadog_checks_base/datadog_checks/base/checks/windows/              @DataDog/wi
 /proofpoint_on_demand/manifest.json                                 @DataDog/saas-integrations @DataDog/documentation
 /proofpoint_on_demand/assets/logs/                                  @DataDog/saas-integrations @DataDog/documentation @DataDog/logs-integrations-reviewers
 
+/resend/                                                            @DataDog/saas-integrations
+/resend/*.md                                                        @DataDog/saas-integrations @DataDog/documentation
+/resend/manifest.json                                               @DataDog/saas-integrations @DataDog/documentation
+/resend/assets/logs/                                                @DataDog/saas-integrations @DataDog/documentation @DataDog/logs-integrations-reviewers
+
 /sanity/                                                            @DataDog/saas-integrations
 /sanity/*.md                                                        @DataDog/saas-integrations @DataDog/documentation
 /sanity/manifest.json                                               @DataDog/saas-integrations @DataDog/documentation

.github/workflows/config/labeler.yml

@@ -589,6 +589,8 @@ integration/ray:
 - ray/**/*
 integration/redisdb:
 - redisdb/**/*
+integration/resend:
+- resend/**/*
 integration/rethinkdb:
 - rethinkdb/**/*
 integration/riak:

resend/CHANGELOG.md

@@ -0,0 +1,7 @@
+# CHANGELOG - Resend
+
+## 1.0.0 / 2025-11-21
+
+***Added***:
+
+* Initial Release

resend/README.md

@@ -0,0 +1,64 @@
+# Resend
+
+## Overview
+
+[Resend][1] is an email delivery service for sending broadcast and transactional emails via a developer API.
+
+To gain insights into Resend's broadcast and transactional message streams, integrate Resend with Datadog using [webhooks][2].
+This allows events to be received by Datadog and converted to logs.
+
+## Setup
+
+Follow the instructions below to configure this integration for your Resend account.
+
+
+### Configuration
+
+#### Webhook configuration steps
+Create a webhook in Resend to forward events to Datadog:
+1. Log into your [Resend account][3] and navigate to the [webhooks][4] page.
+2. Click the **Add webhook** button and enter the following:
+   - Enter the url provided by Datadog.
+   - Select "All Events" for the events types.
+3. Click **Add**.
+
+#### Optional: Enable click tracking for each Resend domain
+Follow these steps to enable email click and optionally open email tracking for each Resend domain:
+1. Navigate to the Resend [domains][5] page.
+3. For each sending domain in use:
+   1. Click on the domain name to edit.
+   2. In the Configuration section, enable **Click Tracking**.
+   3. Optionally, enable **Open Tracking**. Though Resend [cautions against depending on open tracking](https://resend.com/docs/knowledge-base/why-are-my-open-rates-not-accurate).
+
+#### Optional: Surface the use of tags in transactional email in the Datadog Dashboard
+The Resend API supports per-message tags for transactional email, such as a 
+`priority` attribute with values of _high_, _normal_, or _low_. The tag can be 
+defined as a template variable in the Datadog dashboard to filter results by tag value. 
+For an example, see the `priority` template variable in the Resend Overview dashboard provided with this integration.
+
+## Data Collected
+
+### Logs
+The Resend integration converts Resend webhook events to Datadog logs. The events
+contain email header and tag information which included sender and recipient email addresses.
+Actual email content is not included in the events.
+
+### Metrics
+The Resend integration does not define any metrics.
+
+### Service Checks
+Resend does not include any service checks.
+
+### Events
+Resend does not include any events.
+
+## Troubleshooting
+
+Need help? Contact [Datadog support][6].
+
+[1]: https://resend.com/
+[2]: https://resend.com/docs/dashboard/webhooks/introduction
+[3]: https://resend.com/login
+[4]: https://resend.com/webhooks
+[5]: https://resend.com/domains
+[6]: https://docs.datadoghq.com/help/