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

# Product Update: 1

> Campaign Scheduling and API, Custom email headers

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  <img src="https://mintcdn.com/ossapps/IRky_28zjbUDKDwj/images/changelog/schedule-campaign.png?fit=max&auto=format&n=IRky_28zjbUDKDwj&q=85&s=c796748060c400fc0090e6e335c50d4e" alt="v1.7.0 Product Update" width="1608" height="940" data-path="images/changelog/schedule-campaign.png" />
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### Campaign Scheduling with Natural Language

Schedule your campaigns effortlessly using natural language inputs like "tomorrow at 9am" or "next Monday at 10am". Available via API as well

### Campaigns API

We're doubling down on APIs. You can now create, schedule, and manage campaign emails programmatically through our API.

Check out the [Campaign API documentation](/api-reference/campaigns/create-campaign) to get started.

### Custom email headers

You can now send custom email headers via api, comes in handy when you want to send unsub links for transactional emails

Checkout the [docs here](/api-reference/emails/send-email#body-headers)

### Other Improvements

* Upload large amounts of contacts without experiencing UI slowness
* Delete Domain API
* Export emails with bounce reason and filters
* Create API keys domain restriction