Reduce the size of your email attachments and ensure their confidentiality with WinZip Courier 3.0! . With state-of-the-art compression and encryption technology, Courier delivers the power of WinZip where it’s needed most—your email system! This easy-to-use tool seamlessly integrates with your email application to automatically zip and protect outgoing files as you work. Simply write your email, attach your files, and click Send—Courier does the rest!