---
title: Prerequisites · Cloudflare Zero Trust docs
lastUpdated: 2025-04-10T10:40:28.000Z
chatbotDeprioritize: true
source_url:
  html: https://developers.cloudflare.com/cloudflare-one/email-security/setup/pre-delivery-deployment/prerequisites/
  md: https://developers.cloudflare.com/cloudflare-one/email-security/setup/pre-delivery-deployment/prerequisites/index.md
---

* [Microsoft 365 as MX Record](https://developers.cloudflare.com/cloudflare-one/email-security/setup/pre-delivery-deployment/prerequisites/m365-email-security-mx/)
* [Google Workspace as MX Record](https://developers.cloudflare.com/cloudflare-one/email-security/setup/pre-delivery-deployment/prerequisites/gsuite-email-security-mx/)
* [Cisco - Email Security as MX Record](https://developers.cloudflare.com/cloudflare-one/email-security/setup/pre-delivery-deployment/prerequisites/cisco-email-security-mx/)
* [Cisco - Cisco as MX Record](https://developers.cloudflare.com/cloudflare-one/email-security/setup/pre-delivery-deployment/prerequisites/cisco-mx/)
