---
title: MEExtensionCapabilities
framework: bundleresources
role: symbol
role_heading: Property List Key
path: bundleresources/information-property-list/nsextension/nsextensionattributes/meextensioncapabilities
---

# MEExtensionCapabilities

## Possible Values

MEComposeSessionHandler: MEMessageActionHandler: MEContentBlocker: MEMessageSecurityHandler:

## See Also

### Mail

- [MEComposeSession](bundleresources/information-property-list/nsextension/nsextensionattributes/mecomposesession.md)