---
title: "autospf.co · AutoSPF"
description: "autospf.co is a DuoCircle domain connected to AutoSPF, our SPF flattening and shortening service. The AutoSPF DNS is served from autospf.email; the product lives at autospf.com."
canonical: "https://autospf.co/"
---

AutoSPF · Operated by DuoCircle 

# autospf.co

A DuoCircle domain connected to AutoSPF. There is nothing to use here.

## What this domain is

`autospf.co` is a DuoCircle domain connected to **AutoSPF**, our SPF flattening and shortening service. It is not a website, an application, or a place to sign in.

## About AutoSPF

AutoSPF flattens and shortens SPF records so a sending domain's SPF stays within the 10 DNS-lookup limit and updates automatically as its upstream senders change. The service runs on dedicated DNS infrastructure operated by DuoCircle, and `autospf.co`is one of the DuoCircle domains connected to it.

## The DNS runs on autospf.email

AutoSPF's SPF flattening records are served over **DNS on port 53** from`autospf.email`. This hostname, `autospf.co`, is not the DNS server: there is no web application, customer portal, or API here, and nothing to open in a browser. If you reached this page, this note is all there is.

## The AutoSPF product

Documentation, pricing, sign-up, and support for AutoSPF live on the main site.

[Go to autospf.com →](https://autospf.com/)