---
title: Episerver Mail 8
slug: cms-11/dev-docs/episerver-mail-8
docTags: 
createdAt: 2026-07-22T19:45:21.613Z
---

This version is compatible with Optimizely Content Management System (CMS 9).

## Breaking changes

New version of Structure Map in CMS 9.

## Install

- Available as a NuGet package for upgrading an existing installation.
- A first-time installation can only be done by installing Mail 7.5 through the Deployment Center and then upgrade to the latest through NuGet.

:::hint{type="info"}
**Note**
If your site is not visible in Deployment Center, select the **Show All Sites** check box.
:::