Let me be more specific. Modest is Maemo e-mail client. It has plugin subsystem which can be used to support not built-in email protocols. MfE is such kind of protocol from modest PoV. So, in order to integrate MfE and modest, modest plugin and camel provider were developed. But this is only integration stuff. Nothing more. No additional e-mail client has been developed by MfE for maemo. System-wide client is used which is modest.