---
title: Response Headers
slug: email-verification-response-headers
docTags: 
createdAt: 2026-06-16T03:07:41.730Z
---

:::hint{type="warning"}
## Legacy API — sunsets June 1, 2027

This page documents the original mailfloss API, which is being retired on **June 1, 2027**. New integrations should use the [v1 API](https://developers.mailfloss.com/quickstart).
:::

The Content-Type of the requests should be `application/json`. The Content-Type of responses will be `application/json`.

Along with each response, the following HTTP headers are included:

- `x-ratelimit-limit` - The rate limit of 50 requests per minute.
- `x-ratelimit-remaining` - The rate limit remaining in the current window