Email plus Voice for Outlook Express (Windows Mail) - Version 1.0 Email plus Voice is a Outlook Express (Windows Mail) plugin, that allows to add a voice to the mail message. It has simple and handy interface and enhanced abilities. It works with Outlook Express 5,6 and Windows Mail. MPEG Layer-3 (mp3) compression is used for recording. It allows to create small size files (1sec – 1KB) with a high quality.