> ## Documentation Index
> Fetch the complete documentation index at: https://docs.unosend.co/llms.txt
> Use this file to discover all available pages before exploring further.

# Changelog

> Track all updates and improvements to the Unosend API.

<Info>
  Follow [@unosendco](https://x.com/unosendco) to stay updated on new features.
</Info>

## May 2026

**May 16, 2026** - Platform Launch

* **REST API** — Send transactional emails via `api.unosend.co`
* **SMTP Relay** — Connect via `smtp.unosend.co:587` with TLS
* **Email Templates** — Create and send with dynamic merge tags
* **Domain Authentication** — SPF, DKIM, and CNAME tracking verification
* **Webhooks** — Real-time delivery, bounce, open, and click notifications
* **Suppression Lists** — Automatic bounce/complaint handling
* **Email Logs** — Full delivery history with export capability
* **File Cache** — Upload and reuse attachments across emails
* **Batch Sending** — Send to multiple recipients in one API call
* **Open & Click Tracking** — Built-in tracking with per-email control
* **Dedicated IP** — Available for high-volume senders