---
title: Build Mail App Extensions
framework: mailkit
role: sampleCode
role_heading: Sample Code
path: sample-code/mailkit/build-mail-app-extensions
---

# Build Mail App Extensions

Create app extensions that block content, perform message and composing actions, and help message security.

## Overview

Overview note: This sample code project is associated with WWDC21 session 10168: Build Mail App Extensions.

## See Also

### Essentials

- [MEExtension](mailkit/meextension.md)