---
title: MEExtensionViewController
framework: mailkit
role: symbol
role_heading: Class
path: mailkit/meextensionviewcontroller
---

# MEExtensionViewController

An object that manages a view for compose session and message security handlers.

## Declaration

```swift
class MEExtensionViewController
```

## Overview

Overview Create a custom subclass of MEExtensionViewController to provide MailKit with a view that displays: Additional configuration options in a Mail compose window Details about the user who signed a digitally signed email message

## Relationships

### Inherits From

- [NSViewController](appkit/nsviewcontroller.md)

### Conforms To

- [CVarArg](swift/cvararg.md)
- [CustomDebugStringConvertible](swift/customdebugstringconvertible.md)
- [CustomStringConvertible](swift/customstringconvertible.md)
- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [NSCoding](foundation/nscoding.md)
- [NSEditor](appkit/nseditor.md)
- [NSExtensionRequestHandling](foundation/nsextensionrequesthandling.md)
- [NSObjectProtocol](objectivec/nsobjectprotocol.md)
- [NSSeguePerforming](appkit/nssegueperforming.md)
- [NSStandardKeyBindingResponding](appkit/nsstandardkeybindingresponding.md)
- [NSTouchBarProvider](appkit/nstouchbarprovider.md)
- [NSUserActivityRestoring](appkit/nsuseractivityrestoring.md)
- [NSUserInterfaceItemIdentification](appkit/nsuserinterfaceitemidentification.md)